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January 12, 2012 | History

U.S. patents covering time keeping mechanisms 1 editions

Cover of: U.S. patents covering time keeping mechanisms | United States. Patent Office
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1 edition First published in 1923

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Cover of: U.S. patents covering time keeping mechanisms
1923, U.S. Patent Office
U.S. patents covering time keeping mechanisms
in English

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January 12, 2012 Edited by ImportBot import new book
November 17, 2011 Created by ImportBot import new book