| All Patents in class 477/19 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 1,563,546 | Dec. 01, 1925 | C. Bouillon | Electric Motor Driven Change Speed Device | |
| 1,611,042 | Dec. 14, 1926 | H.L. Johnston, M.K. Akers | Variable-speed mechanism | |
| 2,486,254 | Oct. 25, 1949 | T.S. Briskin, J.C. Zivny | Control mechanism for electrically driven tools | handheld drills |
| 2,545,053 | Mar. 13, 1951 | G.J. Kasselmann, H.J. Siekmann | Lathe Transmission and Control Mechanism | machine mechanisms |
| 2,554,721 | May 29, 1951 | G.J. Kasselmann, H.J. Siekmann | Dial Indicating Mechanism | machine mechanisms |
| 3,150,537 | Sep. 29, 1964 | O. Hermann | Method and Apparatus for Automatically Shifting Gears | machine mechanisms |
