U.S. patents covering time keeping mechanisms
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Author
Publication
1923 - U.S. Patent Office, Washington, D.C., District of Columbia
Language
English
Word Count
0 words, Guess
Page Count
0 pages
Identifiers
- Internet Archiveuspatentscoverin00unit
- OCLC Control Number34739706
- Open LibraryOL25104888M
Alternate Titles
- United States patents covering time keeping mechanisms
- Time keeping mechanisms
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