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Blake, P.: ¬The arrival of free patent information : Internet provision of patent information for free is affecting vendors (1998)
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Segura, P.; Zea, B.: Designing online/CD-ROM services to meet user needs : experiences from an emerging information market (1991)
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Basch, R.: UnCover (1995)
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Williams, J.; Ebe, T.: STN Easy : point-and-click patent searching on the World Wide Web (1997)
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White, M.J.: Patents and patent searching (2009)
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