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All Patents in class 285/87
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	513,827	Jan. 30, 1894	F.H. Richards	Turret Machine for Boring Cylinders
	2,315,981	Apr. 06, 1943	H.T. Olson	Filter Mount for Photographic Cameras

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