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All Patents in class 254/412
Patents 1 - 3 of 3
First set of recordsLast set of records
PictureNumberDatePatenteeTitle
12,776May 01, 1855C. Cowdry, O. Tolls, C.C. TollsWheelwrights Boring & Tenoning Machine
  471,519Mar. 22, 1892P. FreundPulley Block
  508,538Nov. 14, 1893J. ChaseElectric-railway trolley
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