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| All Patents in class 72/65 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 245,741 | Aug. 16, 1881 | T.W. Webb, P.D. Nicols | Machine for Twisting Drill Blanks | ||
| 331,904 | Dec. 08, 1885 | S. Moore | Machine for Making Twist Drills | ||
| 354,069 | Dec. 07, 1886 | S. Moore | Machine for Making Twist Drills | ||
| 680,903 | Aug. 20, 1901 | C.D. Wiley | Machine for Producing Twist Drills | ||
| 1,561,803 | Nov. 17, 1925 | H.C. Smith | Strip-Straightening Attachment For Rotary Shears | ||