| Patents for Thomas Elevator Co. |
Patents 1 -
10
of 15
      |
| Picture | Number | Date | Patentee | Title |
 | 736,572 | Aug. 18, 1903 | W.A. Barker | Electric hoist |
 | 787,609 | Apr. 18, 1905 | W.A. Barker | Hoisting-machine |
 | 983,668 | Feb. 07, 1911 | W.A. Barker | Friction-brake mechanism |
 | 1,022,349 | Apr. 02, 1912 | W.A. Barker | Multiple hoist |
 | 1,033,776 | Jul. 30, 1912 | W.A. Barker | Mechanical movement |
 | CA-145,032 | Dec. 31, 1912 | W.A. Barker | Mechanical movement |
 | 1,054,666 | Mar. 04, 1913 | W.A. Barker | Clutch mechanism |
 | 1,141,679 | Jun. 01, 1915 | W.A. Barker | Electrically-driven hoist |
 | 1,155,784 | Oct. 05, 1915 | W.A. Barker | Hoisting-machine |
 | 1,178,702 | Apr. 11, 1916 | W.A. Barker | Mechanical movement |
