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Patents for Pratt & Whitney Co.
Patents 16 - 30 of 261
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NumberDatePatenteeTitleType
170,949Dec. 14, 1875J.J. GrantImprovement in screw-cutting die holderstap wrenches and die stocks
172,854Feb. 01, 1876J.J. GrantImprovement in Tap-Wrenchestap wrenches and die stocks
173,780Feb. 22, 1876J.J. GrantImprovement in screw-cutting diestaps and dies
176,683Apr. 25, 1876J. RenshawRatchet Drillratchet drills
189,057Apr. 03, 1877J.R. Reynolds, F.A. PrattImprovement in machines for varnishing the interior of cartridge-shellscartridges
204,028May 21, 1878F.N. Gardner, N. Sawyer, J.J. GrantImprovement in screw-cutting diestaps and dies
231,607Aug. 24, 1880E.G. ParkhurstMachine-gunfirearms
241,236May 10, 1881F.A. PrattAdjustable levercranes
241,563May 17, 1881F.A. PrattMetal-planing machinemetal planers
248,587Oct. 25, 1881W. GrayDevice for Throwing Belts Onto or Off From Revolving Pulleysbelt shifters
256,165Apr. 11, 1882J.R. ReynoldsMachine for Cutting Grooves in Rollsmetal planer accessories
259,040Jun. 06, 1882E.G. ParkhurstAmmunition-box
275,431Apr. 10, 1883C.M. SpencerMetal Screw Machinescrew machines
290,612Dec. 18, 1883W.W. TuckerKnurling-toollathe tools
298,979May 20, 1884M.C. JohnsonFriction Clutchindustrial machine clutches
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