| All Patents in class 474/40 |
Patents 1 -
6
of 6
      |
| Picture | Number | Date | Patentee | Title |
| | 1,434,992 | Nov. 07, 1922 | H.C. Clay | Speed Varying Transmission |
 | 1,921,758 | Aug. 08, 1933 | L.F. Koss, Jr. | Variable speed drive |
 | 2,258,776 | Oct. 14, 1941 | A.W. L'Hommedieu, E. Hawkinson | Variable speed mechanism |
| | 2,501,450 | Mar. 21, 1950 | G.K. McKee | Machine tool transmission |
| | 3,150,527 | Sep. 29, 1964 | G.L. Trandel | Variable speed device and adjusting means therefor |
 | 5,186,088 | Feb. 16, 1993 | B.D. Wixey | Wood lathe with sliding, horizontally-rotatable headstock and variable speed drive |
