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| All Patents in class 396/150 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,061,736 | May 13, 1913 | W.F. Folmer | Multiplying Camera Back | camera accessories | |
| 2,575,902 | Nov. 20, 1951 | J. Woerman, V. Yager | Air Vent And Focusing Screen Support For Bellows Type Cameras | camera accessories | |