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| All Patents in class 396/322 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,454,218 | May 08, 1923 | W.F. Folmer | Photographic Optical System | camera accessories | |
| 1,977,453 | Oct. 16, 1934 | E.S. Hineline, W.H. Petit | Means and Method for Photographing a Large Surface with Short Focus Lenses | cameras | |