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| All Patents in class 226/76 | |||||
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| Number | Date | Patentee | Title | Type | |
| 760,908 | May 24, 1904 | P. Mullen | Hoisting mechanism | hoists, winches, come-alongs | |
| 3,145,892 | Aug. 25, 1964 | J.F. Herrmann | Film Advancing Mechanism for Photographic Projectors | projectors | |
| 3,680,754 | Aug. 01, 1972 | F.L. Blaakman, R.N. McFadden | Filmstrip Advancing Mechanism | audio-visual apparatus | |