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| All Patents in class 396/203 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,329,011 | Sep. 07, 1943 | O. Steiner | Photographic Flash Synchronization Equipment | ||
| 2,664,795 | Jan. 05, 1954 | F.F. Tone | Photoflash Flash Lighting and Sychronizing System | ||