| Patents for William H. Ridgway |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
 | 276,076 | Apr. 17, 1883 | W.H. Ridgway | Elevator |
 | 374,756 | Dec. 13, 1887 | W.H. Ridgway | Crane |
 | 411,681 | Sep. 24, 1889 | W.H. Ridgway | Crane |
 | 415,561 | Nov. 19, 1889 | W.H. Ridgway | Water-wheel |
 | 453,449 | Jun. 02, 1891 | W.H. Ridgway | Jet or impact water-wheel |
 | 582,092 | May 04, 1897 | W.H. Ridgway | Air-hoist |
 | 649,357 | May 08, 1900 | W.H. Ridgway | Hoisting apparatus |
 | 666,156 | Jan. 15, 1901 | E.B. Ridgway | Steam hydraulic elevator |
 | 833,632 | Oct. 16, 1906 | W.H. Ridgway | Steam hydraulic hoist |
 | 914,978 | Mar. 09, 1909 | W.H. Ridgway | Overflow device for pressure-tanks, &c. |
