Document (#20656)

Author

Rampelmann, J.

Title

Classification tools at the EPO

Source

World patent information. 18(1996) no.3, S.149-153

Year

1996

Abstract

Describes the European Classification System (ECLA) used by search examiners at the General Directorate 1 (DG 1) of the European Patent Office in The Hague, Netherlands, for classifying patent applications for publication, new patent documents and non-patent literature for addition to the systematic search documentation. ECLA is an internal classification tool developed on the basis of the International Patent Classification (IPC) but with further subdivisions and better adaptation to the different technical fields. In order to overcome the limitations of a classification system, secondary systems are also in use or under development. One such system is the ICO (In Computer Only) system which offers online only light indexing schenmes for the identification of additional information contained in patent documents

Field

Patentinformation

Object

IPC
ECLA

Similar documents (content)

1. Thielen, J. van: Online classification and indexation of documents at the European Patent Office (1998) 0.78

   0.7799969 = sum of:
     0.7799969 = product of:
       1.7727202 = sum of:
         0.043861505 = weight(abstract_txt:additional in 2607) [ClassicSimilarity], result of:
           0.043861505 = score(doc=2607,freq=1.0), product of:
             0.08281549 = queryWeight, product of:
               1.0609677 = boost
               5.6493783 = idf(docFreq=424, maxDocs=44421)
               0.013816841 = queryNorm
             0.52962923 = fieldWeight in 2607, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6493783 = idf(docFreq=424, maxDocs=44421)
               0.09375 = fieldNorm(doc=2607)
         0.08239385 = weight(abstract_txt:documentation in 2607) [ClassicSimilarity], result of:
           0.08239385 = score(doc=2607,freq=3.0), product of:
             0.08742025 = queryWeight, product of:
               1.090065 = boost
               5.8043137 = idf(docFreq=363, maxDocs=44421)
               0.013816841 = queryNorm
             0.94250304 = fieldWeight in 2607, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.8043137 = idf(docFreq=363, maxDocs=44421)
               0.09375 = fieldNorm(doc=2607)
         0.057982996 = weight(abstract_txt:internal in 2607) [ClassicSimilarity], result of:
           0.057982996 = score(doc=2607,freq=1.0), product of:
             0.09975232 = queryWeight, product of:
               1.1644152 = boost
               6.2002096 = idf(docFreq=244, maxDocs=44421)
               0.013816841 = queryNorm
             0.5812696 = fieldWeight in 2607, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.2002096 = idf(docFreq=244, maxDocs=44421)
               0.09375 = fieldNorm(doc=2607)
         0.07118108 = weight(abstract_txt:office in 2607) [ClassicSimilarity], result of:
           0.07118108 = score(doc=2607,freq=1.0), product of:
             0.11436653 = queryWeight, product of:
               1.2467973 = boost
               6.6388726 = idf(docFreq=157, maxDocs=44421)
               0.013816841 = queryNorm
             0.6223943 = fieldWeight in 2607, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.6388726 = idf(docFreq=157, maxDocs=44421)
               0.09375 = fieldNorm(doc=2607)
         0.10249555 = weight(abstract_txt:subdivisions in 2607) [ClassicSimilarity], result of:
           0.10249555 = score(doc=2607,freq=1.0), product of:
             0.14583415 = queryWeight, product of:
               1.4079136 = boost
               7.496775 = idf(docFreq=66, maxDocs=44421)
               0.013816841 = queryNorm
             0.7028227 = fieldWeight in 2607, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.496775 = idf(docFreq=66, maxDocs=44421)
               0.09375 = fieldNorm(doc=2607)
         0.034107767 = weight(abstract_txt:documents in 2607) [ClassicSimilarity], result of:
           0.034107767 = score(doc=2607,freq=1.0), product of:
             0.088233754 = queryWeight, product of:
               1.5487409 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.013816841 = queryNorm
             0.38656145 = fieldWeight in 2607, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.09375 = fieldNorm(doc=2607)
         0.036976147 = weight(abstract_txt:only in 2607) [ClassicSimilarity], result of:
           0.036976147 = score(doc=2607,freq=1.0), product of:
             0.09311372 = queryWeight, product of:
               1.5909928 = boost
               4.235812 = idf(docFreq=1746, maxDocs=44421)
               0.013816841 = queryNorm
             0.3971074 = fieldWeight in 2607, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.235812 = idf(docFreq=1746, maxDocs=44421)
               0.09375 = fieldNorm(doc=2607)
         0.33479512 = weight(abstract_txt:examiners in 2607) [ClassicSimilarity], result of:
           0.33479512 = score(doc=2607,freq=2.0), product of:
             0.2548191 = queryWeight, product of:
               1.8610686 = boost
               9.909708 = idf(docFreq=5, maxDocs=44421)
               0.013816841 = queryNorm
             1.3138541 = fieldWeight in 2607, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               9.909708 = idf(docFreq=5, maxDocs=44421)
               0.09375 = fieldNorm(doc=2607)
         0.089870885 = weight(abstract_txt:european in 2607) [ClassicSimilarity], result of:
           0.089870885 = score(doc=2607,freq=1.0), product of:
             0.1683237 = queryWeight, product of:
               2.1391144 = boost
               5.6951146 = idf(docFreq=405, maxDocs=44421)
               0.013816841 = queryNorm
             0.533917 = fieldWeight in 2607, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6951146 = idf(docFreq=405, maxDocs=44421)
               0.09375 = fieldNorm(doc=2607)
         0.07738828 = weight(abstract_txt:classification in 2607) [ClassicSimilarity], result of:
           0.07738828 = score(doc=2607,freq=1.0), product of:
             0.20677404 = queryWeight, product of:
               3.7486887 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.013816841 = queryNorm
             0.37426496 = fieldWeight in 2607, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.09375 = fieldNorm(doc=2607)
         0.841667 = weight(abstract_txt:patent in 2607) [ClassicSimilarity], result of:
           0.841667 = score(doc=2607,freq=3.0), product of:
             0.74786997 = queryWeight, product of:
               7.809713 = boost
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.013816841 = queryNorm
             1.1254189 = fieldWeight in 2607, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.09375 = fieldNorm(doc=2607)
       0.44 = coord(11/25)
   

2. Dickens, D.T.: ¬The ECLA classification system (1994) 0.51

   0.51293254 = sum of:
     0.51293254 = product of:
       1.6029142 = sum of:
         0.06764683 = weight(abstract_txt:internal in 3645) [ClassicSimilarity], result of:
           0.06764683 = score(doc=3645,freq=1.0), product of:
             0.09975232 = queryWeight, product of:
               1.1644152 = boost
               6.2002096 = idf(docFreq=244, maxDocs=44421)
               0.013816841 = queryNorm
             0.6781479 = fieldWeight in 3645, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.2002096 = idf(docFreq=244, maxDocs=44421)
               0.109375 = fieldNorm(doc=3645)
         0.07631409 = weight(abstract_txt:overcome in 3645) [ClassicSimilarity], result of:
           0.07631409 = score(doc=3645,freq=1.0), product of:
             0.10810054 = queryWeight, product of:
               1.2121611 = boost
               6.4544435 = idf(docFreq=189, maxDocs=44421)
               0.013816841 = queryNorm
             0.70595473 = fieldWeight in 3645, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.4544435 = idf(docFreq=189, maxDocs=44421)
               0.109375 = fieldNorm(doc=3645)
         0.08304459 = weight(abstract_txt:office in 3645) [ClassicSimilarity], result of:
           0.08304459 = score(doc=3645,freq=1.0), product of:
             0.11436653 = queryWeight, product of:
               1.2467973 = boost
               6.6388726 = idf(docFreq=157, maxDocs=44421)
               0.013816841 = queryNorm
             0.7261267 = fieldWeight in 3645, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.6388726 = idf(docFreq=157, maxDocs=44421)
               0.109375 = fieldNorm(doc=3645)
         0.027706215 = weight(abstract_txt:search in 3645) [ClassicSimilarity], result of:
           0.027706215 = score(doc=3645,freq=1.0), product of:
             0.06931377 = queryWeight, product of:
               1.3726858 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.013816841 = queryNorm
             0.39972165 = fieldWeight in 3645, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.109375 = fieldNorm(doc=3645)
         0.1482794 = weight(abstract_txt:european in 3645) [ClassicSimilarity], result of:
           0.1482794 = score(doc=3645,freq=2.0), product of:
             0.1683237 = queryWeight, product of:
               2.1391144 = boost
               5.6951146 = idf(docFreq=405, maxDocs=44421)
               0.013816841 = queryNorm
             0.88091815 = fieldWeight in 3645, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.6951146 = idf(docFreq=405, maxDocs=44421)
               0.109375 = fieldNorm(doc=3645)
         0.06159783 = weight(abstract_txt:system in 3645) [ClassicSimilarity], result of:
           0.06159783 = score(doc=3645,freq=2.0), product of:
             0.11807148 = queryWeight, product of:
               2.5336633 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.013816841 = queryNorm
             0.5216995 = fieldWeight in 3645, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.109375 = fieldNorm(doc=3645)
         0.15638049 = weight(abstract_txt:classification in 3645) [ClassicSimilarity], result of:
           0.15638049 = score(doc=3645,freq=3.0), product of:
             0.20677404 = queryWeight, product of:
               3.7486887 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.013816841 = queryNorm
             0.75628686 = fieldWeight in 3645, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.109375 = fieldNorm(doc=3645)
         0.9819448 = weight(abstract_txt:patent in 3645) [ClassicSimilarity], result of:
           0.9819448 = score(doc=3645,freq=3.0), product of:
             0.74786997 = queryWeight, product of:
               7.809713 = boost
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.013816841 = queryNorm
             1.3129886 = fieldWeight in 3645, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.109375 = fieldNorm(doc=3645)
       0.32 = coord(8/25)
   

3. Wittmann, A.: Classifying and indexing of patent documents : a retired patent documentalist looks back (1994) 0.40

   0.39880812 = sum of:
     0.39880812 = product of:
       1.4243147 = sum of:
         0.047570113 = weight(abstract_txt:documentation in 1661) [ClassicSimilarity], result of:
           0.047570113 = score(doc=1661,freq=1.0), product of:
             0.08742025 = queryWeight, product of:
               1.090065 = boost
               5.8043137 = idf(docFreq=363, maxDocs=44421)
               0.013816841 = queryNorm
             0.5441544 = fieldWeight in 1661, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8043137 = idf(docFreq=363, maxDocs=44421)
               0.09375 = fieldNorm(doc=1661)
         0.06960413 = weight(abstract_txt:classifying in 1661) [ClassicSimilarity], result of:
           0.06960413 = score(doc=1661,freq=1.0), product of:
             0.112671115 = queryWeight, product of:
               1.2375213 = boost
               6.58948 = idf(docFreq=165, maxDocs=44421)
               0.013816841 = queryNorm
             0.61776376 = fieldWeight in 1661, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.58948 = idf(docFreq=165, maxDocs=44421)
               0.09375 = fieldNorm(doc=1661)
         0.07118108 = weight(abstract_txt:office in 1661) [ClassicSimilarity], result of:
           0.07118108 = score(doc=1661,freq=1.0), product of:
             0.11436653 = queryWeight, product of:
               1.2467973 = boost
               6.6388726 = idf(docFreq=157, maxDocs=44421)
               0.013816841 = queryNorm
             0.6223943 = fieldWeight in 1661, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.6388726 = idf(docFreq=157, maxDocs=44421)
               0.09375 = fieldNorm(doc=1661)
         0.023748184 = weight(abstract_txt:search in 1661) [ClassicSimilarity], result of:
           0.023748184 = score(doc=1661,freq=1.0), product of:
             0.06931377 = queryWeight, product of:
               1.3726858 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.013816841 = queryNorm
             0.34261855 = fieldWeight in 1661, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.09375 = fieldNorm(doc=1661)
         0.04823567 = weight(abstract_txt:documents in 1661) [ClassicSimilarity], result of:
           0.04823567 = score(doc=1661,freq=2.0), product of:
             0.088233754 = queryWeight, product of:
               1.5487409 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.013816841 = queryNorm
             0.54668045 = fieldWeight in 1661, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.09375 = fieldNorm(doc=1661)
         0.07738828 = weight(abstract_txt:classification in 1661) [ClassicSimilarity], result of:
           0.07738828 = score(doc=1661,freq=1.0), product of:
             0.20677404 = queryWeight, product of:
               3.7486887 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.013816841 = queryNorm
             0.37426496 = fieldWeight in 1661, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.09375 = fieldNorm(doc=1661)
         1.0865873 = weight(abstract_txt:patent in 1661) [ClassicSimilarity], result of:
           1.0865873 = score(doc=1661,freq=5.0), product of:
             0.74786997 = queryWeight, product of:
               7.809713 = boost
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.013816841 = queryNorm
             1.4529095 = fieldWeight in 1661, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.09375 = fieldNorm(doc=1661)
       0.28 = coord(7/25)
   

4. Kang, I.-S.; Na, S.-H.; Kim, J.; Lee, J.-H.: Cluster-based patent retrieval (2007) 0.30

   0.3040306 = sum of:
     0.3040306 = product of:
       1.0858235 = sum of:
         0.029241003 = weight(abstract_txt:additional in 1930) [ClassicSimilarity], result of:
           0.029241003 = score(doc=1930,freq=1.0), product of:
             0.08281549 = queryWeight, product of:
               1.0609677 = boost
               5.6493783 = idf(docFreq=424, maxDocs=44421)
               0.013816841 = queryNorm
             0.35308614 = fieldWeight in 1930, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6493783 = idf(docFreq=424, maxDocs=44421)
               0.0625 = fieldNorm(doc=1930)
         0.046402752 = weight(abstract_txt:classifying in 1930) [ClassicSimilarity], result of:
           0.046402752 = score(doc=1930,freq=1.0), product of:
             0.112671115 = queryWeight, product of:
               1.2375213 = boost
               6.58948 = idf(docFreq=165, maxDocs=44421)
               0.013816841 = queryNorm
             0.4118425 = fieldWeight in 1930, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.58948 = idf(docFreq=165, maxDocs=44421)
               0.0625 = fieldNorm(doc=1930)
         0.015832122 = weight(abstract_txt:search in 1930) [ClassicSimilarity], result of:
           0.015832122 = score(doc=1930,freq=1.0), product of:
             0.06931377 = queryWeight, product of:
               1.3726858 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.013816841 = queryNorm
             0.22841237 = fieldWeight in 1930, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.0625 = fieldNorm(doc=1930)
         0.039384257 = weight(abstract_txt:documents in 1930) [ClassicSimilarity], result of:
           0.039384257 = score(doc=1930,freq=3.0), product of:
             0.088233754 = queryWeight, product of:
               1.5487409 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.013816841 = queryNorm
             0.4463627 = fieldWeight in 1930, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0625 = fieldNorm(doc=1930)
         0.024889285 = weight(abstract_txt:system in 1930) [ClassicSimilarity], result of:
           0.024889285 = score(doc=1930,freq=1.0), product of:
             0.11807148 = queryWeight, product of:
               2.5336633 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.013816841 = queryNorm
             0.21079844 = fieldWeight in 1930, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.0625 = fieldNorm(doc=1930)
         0.072962366 = weight(abstract_txt:classification in 1930) [ClassicSimilarity], result of:
           0.072962366 = score(doc=1930,freq=2.0), product of:
             0.20677404 = queryWeight, product of:
               3.7486887 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.013816841 = queryNorm
             0.35286036 = fieldWeight in 1930, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.0625 = fieldNorm(doc=1930)
         0.8571117 = weight(abstract_txt:patent in 1930) [ClassicSimilarity], result of:
           0.8571117 = score(doc=1930,freq=7.0), product of:
             0.74786997 = queryWeight, product of:
               7.809713 = boost
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.013816841 = queryNorm
             1.1460705 = fieldWeight in 1930, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.0625 = fieldNorm(doc=1930)
       0.28 = coord(7/25)
   

5. Lawson, M.: Automatic extraction of citations from the text of English-language patents : an example of template mining (1996) 0.27

   0.2677847 = sum of:
     0.2677847 = product of:
       1.1157696 = sum of:
         0.04745405 = weight(abstract_txt:office in 3654) [ClassicSimilarity], result of:
           0.04745405 = score(doc=3654,freq=1.0), product of:
             0.11436653 = queryWeight, product of:
               1.2467973 = boost
               6.6388726 = idf(docFreq=157, maxDocs=44421)
               0.013816841 = queryNorm
             0.41492954 = fieldWeight in 3654, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.6388726 = idf(docFreq=157, maxDocs=44421)
               0.0625 = fieldNorm(doc=3654)
         0.032157112 = weight(abstract_txt:documents in 3654) [ClassicSimilarity], result of:
           0.032157112 = score(doc=3654,freq=2.0), product of:
             0.088233754 = queryWeight, product of:
               1.5487409 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.013816841 = queryNorm
             0.3644536 = fieldWeight in 3654, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0625 = fieldNorm(doc=3654)
         0.15782392 = weight(abstract_txt:examiners in 3654) [ClassicSimilarity], result of:
           0.15782392 = score(doc=3654,freq=1.0), product of:
             0.2548191 = queryWeight, product of:
               1.8610686 = boost
               9.909708 = idf(docFreq=5, maxDocs=44421)
               0.013816841 = queryNorm
             0.61935675 = fieldWeight in 3654, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.909708 = idf(docFreq=5, maxDocs=44421)
               0.0625 = fieldNorm(doc=3654)
         0.059913922 = weight(abstract_txt:european in 3654) [ClassicSimilarity], result of:
           0.059913922 = score(doc=3654,freq=1.0), product of:
             0.1683237 = queryWeight, product of:
               2.1391144 = boost
               5.6951146 = idf(docFreq=405, maxDocs=44421)
               0.013816841 = queryNorm
             0.35594466 = fieldWeight in 3654, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6951146 = idf(docFreq=405, maxDocs=44421)
               0.0625 = fieldNorm(doc=3654)
         0.024889285 = weight(abstract_txt:system in 3654) [ClassicSimilarity], result of:
           0.024889285 = score(doc=3654,freq=1.0), product of:
             0.11807148 = queryWeight, product of:
               2.5336633 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.013816841 = queryNorm
             0.21079844 = fieldWeight in 3654, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.0625 = fieldNorm(doc=3654)
         0.7935313 = weight(abstract_txt:patent in 3654) [ClassicSimilarity], result of:
           0.7935313 = score(doc=3654,freq=6.0), product of:
             0.74786997 = queryWeight, product of:
               7.809713 = boost
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.013816841 = queryNorm
             1.0610552 = fieldWeight in 3654, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.0625 = fieldNorm(doc=3654)
       0.24 = coord(6/25)