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All Patents in class 92/12
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
533,290Jan. 29, 1895J.D. GrayDirect-acting steam-enginesteam engines
582,092May 04, 1897W.H. RidgwayAir-hoisthoists, winches, come-alongs
649,357May 08, 1900W.H. RidgwayHoisting apparatushoists, winches, come-alongs
1,205,818Nov. 21, 1916E.E. ThomasDash-pot
2,953,122Sep. 20, 1960A.I. ZagarHydraulic check for air drilling unitsmultiple spindle drill presses
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