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Patents for Henry Lawrence De Zeng Jr.
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	681,202	Aug. 27, 1901	H.L. De Zeng, Jr.	Telescopic mounting for guns
	690,019	Dec. 31, 1901	H.L. De Zeng, Jr.	Telescope
	691,248	Jan. 14, 1902	H.L. De Zeng, Jr.	Telescope-mounting for guns

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