| All Patents in class 474/89 |
Patents 16 -
30
of 37
      |
| Number | Date | Patentee | Title | Type |
| 1,650,668 | Nov. 29, 1927 | C.J. Travers | Tractor | |
| 1,785,055 | Dec. 16, 1930 | N.A. Strand | Driving Mechanism | polishing and buffing machinery |
| 1,909,522 | May 16, 1933 | J.G. Collins | Lathe | |
| 2,020,547 | Nov. 12, 1935 | F.S. Haas | Grinding Machine | grinding machines |
| 2,027,111 | Jan. 07, 1936 | R.E. Manley | Motorized drive | industrial machine pulleys and belt drive mechanisms |
| 2,075,297 | Mar. 30, 1937 | J.J. O'Brien | Belt Drive | engine lathes |
| 2,133,593 | Oct. 18, 1938 | H.E. Tautz | Variable speed drive | woodworking machine mechanisms |
| 2,138,117 | Nov. 29, 1938 | M.W. O'Brien, estate of (deceased), J.J. O'Brien | Belt Tighener | engine lathes |
| 2,202,425 | May 28, 1940 | N.M. Marsilius | Hand milling machine | milling machines |
| 2,237,555 | Apr. 08, 1941 | A.N. Haskell | Drive unit mounting | motor mounts |
| 2,258,270 | Oct. 07, 1941 | J. Velk | Driving mechanism | industrial machine pulleys and belt drive mechanisms |
| 2,287,450 | Jun. 23, 1942 | R.B. Price | Belt tightener | woodworking power transmission |
| 2,346,028 | Apr. 04, 1944 | L.B. Huthsing, C.M. Gregory | Variable speed belt drive | drill presses |
| 2,441,775 | May 18, 1948 | G.B. Simonson | Belt shifter | industrial machine pulleys and belt drive mechanisms |
| 2,457,458 | Dec. 28, 1948 | C.A. Girod | Speed device | drill presses |
