| All Patents in class 474/72 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 206,621 | Jul. 30, 1878 | W.R. Schürmann | Changing Speed | industrial machine speed and direction changing mechanisms |
| 289,607 | Dec. 04, 1883 | H. Bilgram | Metal-planer | metal planers |
| 418,383 | Dec. 31, 1889 | V.F. Prentice | Drilling-machine | drill presses |
| 439,080 | Oct. 21, 1890 | F.B. Miles | Mechanism for Operating Clutching and Belt Shifting Devices | industrial machine speed and direction changing mechanisms |
| 586,293 | Jul. 13, 1897 | J.E. Smith | Speed Changing Mechanism for Lathes, Drills or Similar Machines | metalworking variable speed mechanisms |
| 948,697 | Feb. 08, 1910 | B.M. Hanson | Gearing | industrial machine gearing |
| 1,439,747 | Dec. 26, 1922 | J.F. Mirrielees | Drive mechanism for drilling and like machines | drill presses |
| 2,075,240 | Mar. 30, 1937 | H.E. Tautz | Speed change mechanism for screw machines | |
| 2,474,104 | Jun. 21, 1949 | H.C. Kemper, W.F. Groene | Drive Mechanism for Automatic Lathes | metalworking machine mechanisms |
| 2,484,910 | Oct. 18, 1949 | E.D. Vancil, M. Romaine | Variable Speed Mechanism | metalworking variable speed mechanisms |
| 2,830,628 | Apr. 15, 1958 | Y. Tu, D.D. Pettigrew | Multi-speed drive for band saws and the like | bandsaws |
