| All Patents in class 408/239R |
Patents 1 -
10
of 71
      |
| Picture | Number | Date | Patentee | Title |
| | 120,351 | Oct. 24, 1871 | B.L. Walker | Holders for Screw Cutting Dies |
 | 140,727 | Jul. 08, 1873 | S.W. Putnam, Jr. | Improvement in nut-tapping machines |
| | 161,311 | Mar. 23, 1875 | F.E. Wells | Screw-Threading Die |
 | 187,600 | Feb. 20, 1877 | G. Collins | Combination Countersink, Screwdriver & Gimlet Bit |
 | 243,978 | Jul. 05, 1881 | G.S. Rominger | Three-jaw chuck with self-aligning jaws |
 | 295,904 | Apr. 01, 1884 | M.S. Brooks | Tap Wrench |
 | 392,490 | Nov. 06, 1888 | C.E. Billings | Commutator-bar for dynamo-electric machines |
| | 393,511 | Nov. 27, 1888 | S.D. Leland | Tap Driving Head |
 | 442,828 | Dec. 16, 1890 | C.P. Russell | Screw-cutting die |
| | 460,922 | Oct. 06, 1891 | S.B. Minnich | Compensating bit-holder |
