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| All Patents in class 74/502 | |||||
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| Number | Date | Patentee | Title | Type | |
| 379,656 | Mar. 20, 1888 | W.F. Parish | Ratchet Mechanism for Saw Mill Set Works | sawmill set works | |
| 3,390,592 | Jul. 02, 1968 | J.G. Padelt | Coupling for Shutter Release Cable for Cameras | camera accessories | |