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All Patents in class 470/200 | |||||
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Picture | Number | Date | Patentee | Title | |
336,024 | Feb. 09, 1886 | G.D. Tucker | Screw Threading Tool | ||
627,556 | Jun. 27, 1899 | F.L. White | Tap | ||
![]() | 2,227,281 | Dec. 31, 1940 | H.J. Smith | Tap | |
2,954,570 | Oct. 04, 1960 | A. Couch | Holder for Plural Thread Chasing Tools Including Tool Clamping Block With Lubrication Passageway |