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| All Patents in class 235/91C | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 993,047 | May 23, 1911 | W.F. Folmer | Camera | |
| 1,255,868 | Feb. 12, 1918 | W.F. Folmer | Magazine Back for Cameras | ||
| 1,304,673 | May 27, 1919 | W.F. Folmer | Aeroplane Camera | ||
| 1,400,277 | Dec. 13, 1921 | W.F. Folmer | Aviator's Camera | ||
| 2,233,345 | Feb. 25, 1941 | E.S. Hineline | Photographic Camera | ||