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| All Patents in class 219/201 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,345,365 | Mar. 28, 1944 | O. Steiner | Photographic Shutter Particularly Adapted for Aerial Photography | camera shutters | |
| 2,353,898 | Jul. 18, 1944 | R.J. Nitsch | Filter and Heater Unit Holder Particularly for Aerial Cameras | camera accessories | |
| 2,515,146 | Jul. 11, 1950 | F.C. Victory | Means for Maintaining Dimensional Stability in Machine Parts | metalworking machine mechanisms | |