“Coffin & Leighton Company, of Syracuse, New York. 1885-1901.
Coffin & Leighton manufactured a line of highly regarded, tempered steel rules based on United States Letters Patent No. 325,096 awarded to John Coffin & Herbert J. Leighton in 1885. The Leighton rules were noteworthy for the presence of extremely accurate gradations on both their narrow and long sides, markings which served to facilitate bi-directional measuring.” — OldToolHeaven
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