| All Patents in class 74/377 |
Patents 16 -
30
of 33
      |
| Number | Date | Patentee | Title | Type |
| 1,282,088 | Oct. 22, 1918 | G. Langen | Gearing | metalworking machine gearing |
| 1,297,257 | Mar. 11, 1919 | H.W. Schatz | Drilling Machine | radial drill presses |
| 1,506,367 | Aug. 26, 1924 | G.W. Emrick | Tapping attachment | tapping heads and chucks |
| 1,519,316 | Dec. 16, 1924 | J.E. Larsh | Device for imparting rotary motion | tapping machines |
| 1,708,183 | Apr. 09, 1929 | A. Levedahl | Spindle lock | |
| 1,732,038 | Oct. 15, 1929 | F. Schneider, E.L. Connell | Stud-setting machine | |
| 1,752,422 | Apr. 01, 1930 | A.G. Decker | Portable electric tapper | handheld power tool accessories |
| 1,758,656 | May 13, 1930 | G.W. Emrick | Tapping attachment | tapping heads and chucks |
| 1,781,192 | Nov. 11, 1930 | H.G. Procunier | Tapping attachment | tapping heads and chucks |
| 1,796,352 | Mar. 17, 1931 | S.C. Watson | Automatic Tapping Head | tapping heads and chucks |
| 1,855,882 | Apr. 26, 1932 | R.L. Williamson, W.G. Hoelscher | Reversing Gear and Clutch Mechanism | metalworking speed changing mechanisms |
| 1,903,963 | Apr. 18, 1933 | G.W. Emrick | Multiple disk clutch | tapping machines |
| 1,971,955 | Aug. 28, 1934 | W.G. Hoelscher | Reversing Gear and Clutch Mechanism | metalworking power transmission |
| 1,988,967 | Jan. 22, 1935 | G.W. Emrick | Clutch device | tapping heads and chucks |
| 2,012,340 | Aug. 27, 1935 | G.W. Emrick | Tapping attachment | tapping heads and chucks |
