| All Patents in class 192/20 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 162,260 | Apr. 20, 1875 | N.H. Whitten | Improvement in operating paper-calendering rolls | |
| 683,591 | Oct. 01, 1901 | D.B. Bullard | Clutch Mechanism | vertical turret lathes |
| 766,529 | Aug. 02, 1904 | W. Runge | Clutch for lathes or other purposes | metal lathes |
| 1,017,242 | Feb. 13, 1912 | A.B. Browne | Combined Breast Drill and Valve Grinder | combination tools |
| 1,021,875 | Apr. 02, 1912 | C.L. Libby | Gearing | metal lathes |
| 1,023,867 | Apr. 23, 1912 | H.M. Norris | Gearing | metalworking speed changing mechanisms |
| 1,062,840 | May 27, 1913 | W.L. Miller | Clutch Mechanism | metalworking power transmission |
| 1,119,385 | Dec. 01, 1914 | H.F. Arnold | Clutch Mechanism | metalworking machine clutches |
| 1,140,326 | May 18, 1915 | B.M. Hanson | Clutch Mechanism | industrial machine clutches |
| 1,709,339 | Apr. 16, 1929 | F.B. Cockburn | Clutch Mechanism for Lathe Apron Transmission | metal lathe mechanisms |
| 2,245,471 | Jun. 10, 1941 | G.L. Garvin | Friction Clutch for Lathe Aprons | engine lathes |
| 2,619,880 | Dec. 02, 1952 | E.E. Hosea | Machine tool | milling machines |
| 2,940,093 | Jun. 14, 1960 | R.B. Pealer | Drive Release for Geared Threader | pipe threading machines |
