| All Patents in class 192/93R |
Patents 1 -
15
of 30
      |
| Number | Date | Patentee | Title | Type |
| 36,832 | Nov. 04, 1862 | F. Brown, A. Brown | Improvement in friction-coupling | friction clutches |
| 49,312 | Aug. 08, 1865 | F. Skinner | Tightening Pulleys by Friction | industrial machine pulleys and belt drive mechanisms |
| 68,108 | Aug. 27, 1867 | F.J. Plummer | Improvement in clutch-shippers | industrial machine clutches |
| 80,024 | Jul. 14, 1868 | H.K. Smith | Friction Clutch Pulley | industrial machine clutches |
| 266,149 | Oct. 17, 1882 | A. Hendey | Hoisting Machine | |
| 303,321 | Aug. 12, 1884 | F.H. Richards | Friction Clutch | industrial machine clutches |
| 327,082 | Sep. 29, 1885 | W. Hassel | Drop Hammer | drop hammers |
| 345,670 | Jul. 20, 1886 | A. Campbell | Speed Regulator | industrial machine speed and direction changing mechanisms |
| 428,634 | May 27, 1890 | W.N. Rumely | Friction Clutch | traction engine clutches |
| 456,909 | Jul. 28, 1891 | A.C. Rice | Friction-clutch | friction clutches |
| 463,812 | Nov. 24, 1891 | A. Lesperance | Clutch | metalworking power transmission |
| 606,634 | Jun. 28, 1898 | T.H. Worrall, A. Lesperance | Friction-clutch | metalworking power transmission |
| 627,299 | Jun. 20, 1899 | F.G. Echols | Metal-working machine | milling machines |
| 784,653 | Mar. 14, 1905 | O.S. Beyer | Clutch | industrial machine clutches |
| 838,233 | Dec. 11, 1906 | R. Bauer | Power-hammer | drop hammers |
