| All Patents in class 192/70.251 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 174,190 | Feb. 29, 1876 | D.W. Burnham | Pulley-Clutch | industrial machine pulleys and belt drive mechanisms |
| 186,296 | Jan. 16, 1877 | A.B. Bean | Clutch | metalworking power transmission |
| 835,373 | Nov. 06, 1906 | H.R. Stacks | Friction-clutch | industrial machine clutches |
| 924,850 | Jun. 15, 1909 | G.W. Starr | Friction Clutch | industrial machine clutches |
| 1,291,883 | Jan. 21, 1919 | J.B. Highland | Friction-clutch | clutches |
| 1,490,859 | Apr. 15, 1924 | F.H. Sleeper | Friction clutch | friction clutches |
| 1,625,738 | Apr. 19, 1927 | L.F. Nenninger | Machine Tool Clutch | milling machines |
| 1,683,528 | Sep. 04, 1928 | J.C. Carlton | Clutch Mechanism for Reversing Gear | radial drill presses |
| 1,808,240 | Jun. 02, 1931 | C.G. Mahana | Power Transmission Means | industrial machine clutches |
| 2,031,133 | Feb. 18, 1936 | R. Schümann | Electric Hand Tool | handheld grinders |
| 2,324,613 | Jul. 20, 1943 | W.W. Criley | Clutch | industrial machine clutches |
| 2,446,363 | Aug. 03, 1948 | E.W. Daum | Combination positive clutch and torque responsive friction coupling | handheld power tools |
