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All Patents in class 74/438
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
145,398Dec. 09, 1873E. CoapmanImprovement in machines for bending hoopshoop making machines
305,648Sep. 23, 1884B.D. WhitneyGearingindustrial machine gearing
343,352Jun. 08, 1886B.D. WhitneyGearingwoodworking machine mechanisms
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