Patents for Yih-O Tu


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Patents for Yih-O Tu
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	2,830,628	Apr. 15, 1958	Y. Tu, D.D. Pettigrew	Multi-speed drive for band saws and the like
	CA-585,901	Oct. 27, 1959	D.D. Pettigrew, Y. Tu	Multi-speed drive