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Patents
Community of Science - U.S. Patents
A fully searchable bibliographic database containing all U.S. patents issued since 1975.
http://www.patents.cos.com/
PageRank: Not available
Information Specialties Corporation
Provider of patent/trademark copies and file (wrapper) histories.
http://www.informationspecialties.com/
PageRank: Not available
Patent Cafe
Intellectual property resource for inventors, patent attorneys, and the general public.
http://www.patentcafe.com/
PageRank: Not available