| All Patents in class 74/89.23 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 65,089 | May 28, 1867 | W. Johnson | Turning Lathe | metal lathes |
| 120,279 | Oct. 24, 1871 | S. Ingersoll | Improvement in rock-drills | mining apparatus |
| 137,407 | Apr. 01, 1873 | W.B. Bement | Feeding Devices for Punching Machines | punch presses |
| 226,162 | Apr. 06, 1880 | S. Darling | Compensating Errors in Screw Dividing Engines | indexers and dividers |
| 799,987 | Sep. 19, 1905 | C.A. Juengst | Cold-metal-sawing machine | metal sawing machines |
| 3,605,508 | Sep. 20, 1971 | W.B. Fell | Precision threaded adjustment | machinist levels |
