| All Patents in class 74/353 |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| 276,463 | Apr. 24, 1883 | B.B. Powell | Speed Changing Mechanism | industrial machine speed and direction changing mechanisms |
| 324,955 | Aug. 25, 1885 | B.B. Powell | Speed Changing Mechanism | metalworking variable speed mechanisms |
| 432,418 | Jul. 15, 1890 | L. Heath, A.J. Martin | Changeable-speed gearing | |
| 465,827 | Dec. 29, 1891 | H.C. Bradford | Tapping and Thread Cutting Machine | tapping machines |
| 489,317 | Jan. 03, 1893 | A. Mill | Tapping attachment for drills | tapping machines |
| 494,383 | Mar. 28, 1893 | O.E. Perrigo | Engine-Lathe | engine lathes |
| 536,615 | Apr. 02, 1895 | E. Flather | Screw Cutting Lathe | screwcutting lathes |
| 679,568 | Jul. 30, 1901 | E.A. Muller | Engine Lathe | metal lathes |
| 684,433 | Oct. 15, 1901 | H.R. Isler | Differential Speed Mechanism | metal lathes |
| 759,111 | May 03, 1904 | I.H. Johnson, Jr. | Variable Speed Gear for Motor Diven Lathes or Other Tools | metalworking speed changing mechanisms |
| 780,642 | Jan. 24, 1905 | W.W. Earl | Speed-changing mechanism | metal planers |
| 922,880 | May 25, 1909 | E.J. McClellan, G.K. Garvin | Speed Change Gearing | metalworking speed changing mechanisms |
| 1,659,426 | Feb. 14, 1928 | C.M. Conradson | Milling Machine | milling machines |
| 2,263,928 | Nov. 25, 1941 | R.W. Ott, N.M. Marsilius | Milling machine | milling machines |
| 2,281,921 | May 05, 1942 | F.W. Curtis | Tumble Change Gear Mechanism | milling machines |
