7599483
9780160498015
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Indexes the subject of invention of each patent issued during 1997. Arranged by class and subclass numbers. Covers design patents, plant patents, and statutory invention registrations. Also lists patent and trademark depository libraries.Patent and Trademark Office (U.S.) is the author of 'Index of Patents, 1997, Pt. 2, Index to Subjects of Inventions', published 2002 under ISBN 9780160498015 and ISBN 0160498015.
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