| All Patents in class 254/330 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 452,592 | May 19, 1891 | J. Beckner | Traction Engine | steam traction engines |
| 715,991 | Dec. 16, 1902 | C.A. Baechtold, H.N. Covell | Derrick swinging and controlling device | hoists, winches, come-alongs |
| 735,517 | Aug. 04, 1903 | C.W. Hunt | Friction Clutch | friction clutches |
| 787,609 | Apr. 18, 1905 | W.A. Barker | Hoisting-machine | hoists, winches, come-alongs |
| 812,827 | Feb. 20, 1906 | H.N. Covell | Brake-band | hoists, winches, come-alongs |
| 1,141,679 | Jun. 01, 1915 | W.A. Barker | Electrically-driven hoist | hoists, winches, come-alongs |
