| All Patents in class 192/99R |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 162,260 | Apr. 20, 1875 | N.H. Whitten | Improvement in operating paper-calendering rolls | |
| 448,777 | Mar. 24, 1891 | G.W. Drake | Friction Clutch | friction clutches |
| 617,419 | Jan. 10, 1899 | F.G. Hobart | Friction Clutch | industrial machine clutches |
| 681,152 | Aug. 20, 1901 | E.E. Thomas | Cone friction-clutch | industrial machine clutches |
| 834,857 | Oct. 30, 1906 | T.H. Worrall | Clutch | metalworking power transmission |
| 1,293,552 | Feb. 04, 1919 | A.M. Sosa, A.E. Robinson | Clutch | metalworking machine clutches |
