All Patents in class 254/330


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All Patents in class 254/330
Patents 1 - 5 of 5
Picture	Number	Date	Patentee	Title
	452,592	May 19, 1891	J. Beckner	Traction Engine
	715,991	Dec. 16, 1902	C.A. Baechtold, H.N. Covell	Derrick swinging and controlling device
	787,609	Apr. 18, 1905	W.A. Barker	Hoisting-machine
	812,827	Feb. 20, 1906	H.N. Covell	Brake-band
	1,141,679	Jun. 01, 1915	W.A. Barker	Electrically-driven hoist