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Patents for Rudolph A. Boehm
Patents 1 - 5 of 5
First set of recordsLast set of records
PictureNumberDatePatenteeTitle
1,119,676Dec. 01, 1914R.A. BoehmThreading-die holder
  1,345,744Jul. 06, 1920R.A. BoehmCollapsible Tap
  1,415,013May 09, 1922R.A. BoehmCollapsible Tap
  1,470,683Oct. 16, 1923R.A. BoehmScrew Cutting Machine
  1,560,462Nov. 03, 1925R.A. BoehmSelf Opening and Closing Threading Die Holder
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