| All Patents in class 72/237 |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 201,530 | Mar. 19, 1878 | C.F. Jacobson | Machine for Making Twist Drills | making drills and augers |
| 245,741 | Aug. 16, 1881 | T.W. Webb, P.D. Nicols | Machine for Twisting Drill Blanks | making drills and augers |
| 290,612 | Dec. 18, 1883 | W.W. Tucker | Knurling-tool | lathe tools |
| 1,561,803 | Nov. 17, 1925 | H.C. Smith | Strip-Straightening Attachment For Rotary Shears | metal shearing machines |
| 3,570,296 | Mar. 16, 1971 | J.R. Buta | Automatic spacer blocks for rolling mill work roll chocks | rolling mills |
