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Patents for Craig Ridgway & Son Co.
Patents 1 - 10 of 10
First set of recordsLast set of records
NumberDatePatenteeTitleType
276,076Apr. 17, 1883W.H. RidgwayElevatorhoists, winches, come-alongs
374,756Dec. 13, 1887W.H. RidgwayCranejib cranes
411,681Sep. 24, 1889W.H. RidgwayCranejib cranes
415,561Nov. 19, 1889W.H. RidgwayWater-wheelturbine water wheels
453,449Jun. 02, 1891W.H. RidgwayJet or impact water-wheelturbine water wheels
582,092May 04, 1897W.H. RidgwayAir-hoisthoists, winches, come-alongs
649,357May 08, 1900W.H. RidgwayHoisting apparatushoists, winches, come-alongs
666,156Jan. 15, 1901E.B. RidgwaySteam hydraulic elevatorelevators and lifts
833,632Oct. 16, 1906W.H. RidgwaySteam hydraulic hoisthoists, winches, come-alongs
914,978Mar. 09, 1909W.H. RidgwayOverflow device for pressure-tanks, &c.hoists, winches, come-alongs
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