All Patents in class 254/304


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All Patents in class 254/304
Patents 1 - 4 of 4
Number	Date	Patentee	Title	Type
671,177	Apr. 02, 1901	J.V. Beekman	Derrick-engine	hoists, winches, come-alongs
715,991	Dec. 16, 1902	C.A. Baechtold, H.N. Covell	Derrick swinging and controlling device	hoists, winches, come-alongs
765,659	Jul. 26, 1904	H.N. Covell	Rope-drum engine	hoists, winches, come-alongs
933,825	Sep. 14, 1909	H.N. Covell	Road Engine	hoists, winches, come-alongs