| All Patents in class 474/31 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
 | 583,402 | May 25, 1897 | M.O. Reeves | Speed-varying mechanism |
 | 588,354 | Aug. 17, 1897 | M.O. Reeves, E.K. Hood | Variable-speed counter-shaft |
 | 630,407 | Aug. 08, 1899 | M.O. Reeves | Speed-varying mechanism |
 | 710,714 | Oct. 07, 1902 | M.O. Reeves, E.K. Hood | Speed-varying transmission |
 | 727,136 | May 05, 1903 | T.W. Heermans | Elevator Hoisting Mechanism |
| | 1,434,992 | Nov. 07, 1922 | H.C. Clay | Speed Varying Transmission |
| | 1,545,638 | Jul. 14, 1925 | H.C. Clay | Automatic Speed Regulation |
| | 1,662,660 | Mar. 13, 1928 | H.C. Clay | Controller for Variable Speed Transmission |
| | 2,306,541 | Dec. 29, 1942 | H.C. Clay | Floating Hydraulic Control |
