| Patents for Lidgerwood Mfg. Co. |
Patents 1 -
10
of 40
      |
| Picture | Number | Date | Patentee | Title |
 | 150,765 | May 12, 1874 | J. Knowlson, Jr. | Improvement in rope-drums for windlasses |
 | RE9,806 | Jul. 19, 1881 | J. Knowlson, Jr. | Rope-drum for windlasses |
 | 651,972 | Jun. 19, 1900 | S. Mattson | Derrick apparatus |
| | 652,798 | Jul. 03, 1900 | S. Mattson | Winch-head |
| | 671,177 | Apr. 02, 1901 | J.V. Beekman | Derrick-engine |
| | 710,954 | Oct. 14, 1902 | H.N. Covell | Drum-reversing device for winding-engines |
| | 713,487 | Nov. 11, 1902 | P. Olsen | Device for operating the dogs of hoisting-engines |
| | 715,338 | Dec. 09, 1902 | H.N. Covell, C.A. Baechtold | Swinging-gear for derrick engine |
| | 715,991 | Dec. 16, 1902 | C.A. Baechtold, H.N. Covell | Derrick swinging and controlling device |
| | 718,916 | Jan. 20, 1903 | H.N. Covell | Combined brake and friction operating mechanism |
