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Patents for August A. F. Dreyer
Patents 1 - 4 of 4
Number	Date	Patentee	Title	Type
1,281,096	Oct. 08, 1918	C.F. Thullen	Level device	levels
CA-196,597	Jan. 27, 1920	C.F. Thullen	Level device	levels
1,393,328	Oct. 11, 1921	C.F. Thullen	Level device	levels
CA-213,997	Oct. 25, 1921	C.F. Thullen	Level device	levels

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