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| All Patents in class 396/544 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,829,319 | Oct. 27, 1931 | A. Wheeler | Camera | cameras | |
| 2,315,981 | Apr. 06, 1943 | H.T. Olson | Filter Mount for Photographic Cameras | camera accessories | |