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| All Patents in class 396/439 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,236,419 | Aug. 14, 1917 | W.F. Folmer | Aviator's Camera | cameras | |
| 2,345,365 | Mar. 28, 1944 | O. Steiner | Photographic Shutter Particularly Adapted for Aerial Photography | camera shutters | |