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Patents for Francis A. Pratt
Patents 1 - 15 of 24
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29,939Sep. 04, 1860F.A. PrattImprovement in devices for stopping and changing motion
33,816Nov. 26, 1861F.A. PrattImprovement in stopping and changing motion
36,479Sep. 16, 1862F.A. PrattTool-rest for turning-lathesmetal lathe accessories
40,082Sep. 22, 1863F.A. PrattImprovement in attaching pumps to bungs of barrels
40,276Oct. 13, 1863F.A. PrattImprovement in apparatus for attaching pumps to bungs of barrels
60,418Dec. 11, 1866F.A. PrattImprovement in sewing-machines
RE2,588Apr. 30, 1867F.A. PrattImprovement in device for stopping and changing motion
D3,611Aug. 10, 1869F.A. PrattDesign for an upright drilldrill presses
93,903Aug. 17, 1869F.A. PrattMetal Planingmetal planers
100,064Feb. 22, 1870F.A. PrattImprovement in friction-clutchesindustrial machine clutches
D4,439Oct. 25, 1870F.A. PrattDesign for a drilling-machinedrill presses
112,379Mar. 07, 1871F.A. PrattImprovement in machines for shaping and cutting gear-cutters
164,391Jun. 15, 1875F.A. PrattImprovement in metal-shearing machines
164,392Jun. 15, 1875F.A. PrattImprovement in drop-hammers
168,412Oct. 05, 1875F.A. PrattImprovement in cranescranes
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