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| All Patents in class 242/348.4 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,702,673 | Feb. 22, 1955 | O. Steiner | Photographic Film Cartridge | film and plate holders | |
| 2,719,679 | Oct. 04, 1955 | J.G. Padelt, H. Nerwin | Means for Engaging Photographic Film to Connect the Film to the Spool or Core of a Cassette | film and plate holders | |
| 2,721,041 | Oct. 18, 1955 | H. Nerwin | Film Cartridge for Photographic Cameras | film and plate holders | |
| 3,003,712 | Oct. 10, 1961 | R.L. Dalton | Take-Up Spool for Photographic Cameras | roll film spools | |