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All Patents in class 250/234
Patents 1 - 3 of 3
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PictureNumberDatePatenteeTitle
1,794,340Feb. 24, 1931M.K. ParkhurstOptical Measuring Device
1,919,200Jul. 25, 1933H.E. ChildsHeadlight testing device
  2,703,505Mar. 08, 1955J.A. SennApparatus for Aligning Machine Elements
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