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All Patents in class 219/201
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	2,345,365	Mar. 28, 1944	O. Steiner	Photographic Shutter Particularly Adapted for Aerial Photography
	2,353,898	Jul. 18, 1944	R.J. Nitsch	Filter and Heater Unit Holder Particularly for Aerial Cameras
	2,515,146	Jul. 11, 1950	F.C. Victory	Means for Maintaining Dimensional Stability in Machine Parts

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