| Patents for Greenfield Tap & Die Corp. |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| 871,451 | Nov. 19, 1907 | A.J. Smart | Screw-cutting die and holder therefor | tap wrenches and die stocks |
| 956,208 | Apr. 26, 1910 | E.F. Smith | Grinding-machine | surface grinders |
| 965,970 | Aug. 02, 1910 | F.O. Wells | Tap Wrench | tap wrenches and die stocks |
| 966,105 | Aug. 02, 1910 | J.P. Lavigne | Automatic die-head | taps and dies |
| 1,038,967 | Sep. 17, 1912 | W. Russell | Tap-wrench | tap and die holders |
| 1,048,921 | Dec. 31, 1912 | F.E. Wells | Die-blank | taps and dies |
| 1,052,313 | Feb. 04, 1913 | A.B. Carll | Pipe-wrench | wrenches |
| 1,061,129 | May 06, 1913 | C.C. Russell | Screw-plate | tap and die holders |
| 1,074,466 | Sep. 30, 1913 | C.C. Russell | Screw-plate | tap and die holders |
| 1,130,542 | Mar. 02, 1915 | W. Russell | Screw-cutting die | taps and dies |
| 1,307,426 | Jun. 24, 1919 | F.O. Wells | Limit Gage | measuring tools |
| 1,482,856 | Feb. 05, 1924 | R.L. Morgan | Bearing for grinding spindles | grinders |
| 1,830,268 | Nov. 03, 1931 | M.J. Foley | Die holder | tap wrenches and die stocks |
| 1,898,132 | Feb. 21, 1933 | W.B. du Mont, O.E. Koehler | Thread cutting die and holding clip therefor | tap wrenches and die stocks |
