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Pressure differential-driven engine
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Patent number 7,246,550
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Issue date Jul 24, 2007
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William Gilbert
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Atmospheric pressure power plant
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Patent number 4,981,014
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Issue date Jan 1, 1991
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Paul H. Gallagher
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Atmospheric pressure motor
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Patent number 4,449,363
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Issue date May 22, 1984
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Willard R. Custer
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Vacuum system
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Patent number 4,056,334
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Issue date Nov 1, 1977
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William S. Fortune
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3481250
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Patent number 3,481,250
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Issue date Dec 2, 1969
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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3412649
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Patent number 3,412,649
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Issue date Nov 26, 1968
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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2739573
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Patent number 2,739,573
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Issue date Mar 27, 1956
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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1942543
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Patent number 1,942,543
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Issue date Jan 9, 1934
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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1874454
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Patent number 1,874,454
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Issue date Aug 30, 1932
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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1852453
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Patent number 1,852,453
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Issue date Apr 5, 1932
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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1500975
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Patent number 1,500,975
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Issue date Jul 8, 1924
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B60 - VEHICLES IN GENERAL