Index to the U.S. patent classification
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Publication
1978 - Dept. of Commerce, Patent and Trademark Office, Washington, District of Columbia
Language
English
Word Count
55,750 words, Guess
Page Count
223 pages
Identifiers
- Open LibraryOL61393800M
- OCLC Control Number4088117
Classifications
- LCCT223 .I35
Subjects
Topics
Places
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