| All Patents in class 74/334 |
Patents 1 -
15
of 19
      |
| Number | Date | Patentee | Title | Type |
| 773,999 | Nov. 01, 1904 | W. Langdon-Davies, A. Soames | Change Speed Gear | industrial machine speed and direction changing mechanisms |
| 1,090,300 | Mar. 17, 1914 | J. Hartness | Variable Speed Mechanism for Metal Working Machines | metalworking variable speed mechanisms |
| 1,342,928 | Jun. 08, 1920 | W.T. Sears | Change-speed mechanism | radial drill presses |
| 1,715,488 | Jun. 04, 1929 | J.B. Armitage | Transmission and Control Mechanism for Machine Tools | milling machines |
| 1,938,319 | Dec. 05, 1933 | K.H. Conley | Means for Controlling Gear Shifting Mechanism | |
| 1,975,060 | Sep. 25, 1934 | R.E. Flanders | Gear Selecting and Shifting Mechanism | metalworking speed changing mechanisms |
| 1,997,841 | Apr. 16, 1935 | W.E. Twamley | Gear Selecting and Shifting Mechanism | turret lathes |
| 2,037,263 | Apr. 14, 1936 | F.A. Parsons | Transmission | milling machines |
| 2,058,294 | Oct. 20, 1936 | D.B. Bullard | Gear Shifting Control Mechanism | |
| 2,203,743 | Jun. 11, 1940 | F.A. Parsons | Machine Tool Transmission and control | metalworking machine mechanisms |
| 2,266,696 | Dec. 16, 1941 | T.A. Wettig | Lathe | metal lathes |
| 2,331,695 | Oct. 12, 1943 | G.H. Johnson | Transmission and Control Mechanism | metal lathes |
| 2,357,952 | Sep. 12, 1944 | W.G. Hoelscher | Fluid Operated Gear Shifting Mechanism | metalworking speed changing mechanisms |
| 2,469,881 | May 10, 1949 | V.J. Kramer, R.C. Johnson, H.E. Laubach | Headstock Transmission Gear Shifting Mechanism | metalworking machine mechanisms |
| 2,519,794 | Aug. 22, 1950 | H.C. Kemper, H.J. Siekmann | Hydraulic Gear Shifting Mechanism | metalworking machine mechanisms |
