| All Patents in class 408/221 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
| | 269,153 | Dec. 12, 1882 | F. Armstrong | Thread Cutting Die |
 | 422,024 | Feb. 25, 1890 | A.B. Landis | Screw-cutting head |
| | 480,175 | Aug. 02, 1892 | R.J. Dearborn | Screw Threading Die |
| | 574,721 | Jan. 05, 1897 | C. Elterich | Thread Cutting Implement |
| | 575,148 | Jan. 12, 1897 | J.L. Chapman | Chaser Die |
 | 816,570 | Apr. 03, 1906 | J.D. Edmonds | Tool For Straightening Bolts and Retracing the Threads Thereon |
 | 1,017,884 | Feb. 20, 1912 | A.B. Landis | Cutter-head |
| | 1,395,252 | Nov. 01, 1921 | E.E. Beck | Thread Cutting Die |
| | 1,866,542 | Jul. 12, 1932 | R.R. Finn, E.T. Bysshe | Chaser |
