| All Patents in class 474/27 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
 | 2,151,189 | Mar. 21, 1939 | L. Coddington | Variable speed transmission mechanism |
 | 2,157,758 | May 09, 1939 | R.S. Jacobsen | Change Speed Transmission |
 | 2,209,484 | Jul. 30, 1940 | H.E. Tautz | Variable speed mechanism |
 | 2,237,511 | Apr. 08, 1941 | H.E. Tautz | Variable speed transmission |
| | 2,248,948 | Jul. 15, 1941 | H.A. Bowers | Variable Speed Transmission |
| | 2,267,238 | Dec. 23, 1941 | G.W. Irwin | Drill press driving mechanism |
| | 2,581,683 | Jan. 08, 1952 | J. McEwan | Variable-speed drive |
| | 2,661,037 | Dec. 01, 1953 | L. McGihon | Compound woodworking tool with variable drive |
 | 2,689,484 | Sep. 21, 1954 | R.D. Phares | Speed change pulley bracket support |
 | 2,885,897 | May 12, 1959 | D.D. Pettigrew | Lathe drive |
