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| All Patents in class 188/174 | |||||
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| Number | Date | Patentee | Title | Type | |
| 914,756 | Mar. 09, 1909 | C. Saunders | Electrically-operated brake | hoists, winches, come-alongs | |
| 1,698,604 | Jan. 08, 1929 | R. Moore | Floating-lever brake engine | elevators and lifts | |
| 1,733,898 | Oct. 29, 1929 | R. Moore | Braking engine | elevators and lifts | |
| 2,378,304 | Jun. 12, 1945 | M.T. Knutzen | Control means for power operated machinery | ||