1665002
9780405077401
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This threevolume set inventories every patent issued by the United States Patent Office during the first 83 years of its life. Patents are listed by inventor, invention and subject.Leggett, M. D. is the author of 'Subject-Matter Index to Patents for Inventions Issued by the Us Patent Office from 1790 to 1873' with ISBN 9780405077401 and ISBN 0405077408.
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