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Patents for Archibald M. O'Brien
Patents 1 - 6 of 6
Picture	Number	Date	Patentee	Title
	815,642	Mar. 20, 1906	W.T. Sears	Speed-changer
	837,969	Dec. 11, 1906	W.T. Sears	Speeder
	844,415	Feb. 19, 1907	W.T. Sears	Power-transmission device
	844,546	Feb. 19, 1907	W.T. Sears	Power-transmission device
	851,842	Apr. 30, 1907	W.T. Sears	Power-transmission device
	953,183	Mar. 29, 1910	W.T. Sears, H.J. Ruch	Boring or drilling machine

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