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U.S. patents covering time keeping mechanismsU.S. patents covering time keeping mechanisms

U.S. patents covering time keeping mechanisms

United States. Patent Office

About this book

Includes patents dated from April 1892-May 1893.

Details

OL Work ID
OL16286542W

Subjects

Clocks and watchesPatents

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Open Library
Book data from Open Library. Cover images courtesy of Open Library.