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All Patents in class 254/358
Patents 1 - 4 of 4
First set of recordsLast set of records
PictureNumberDatePatenteeTitle
199,955Feb. 05, 1878A. BoxImprovement in screw hoisting-pulley apparatus
411,165Sep. 17, 1889O.H. NoackHoisting-gear
760,908May 24, 1904P. MullenHoisting mechanism
  812,137Feb. 06, 1906W.S. KelleyTraction Engine
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