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Opposed piston engine
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Patent number 4,030,471
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Issue date Jun 21, 1977
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Frank Ginkel
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3691909
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Patent number 3,691,909
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Issue date Sep 19, 1972
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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3683751
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Patent number 3,683,751
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Issue date Aug 15, 1972
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3561328
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Patent number 3,561,328
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Issue date Feb 9, 1971
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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3468262
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Patent number 3,468,262
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Issue date Sep 23, 1969
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3398698
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Patent number 3,398,698
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Issue date Aug 27, 1968
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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3392631
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Patent number 3,392,631
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Issue date Jul 16, 1968
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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3304883
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Patent number 3,304,883
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Issue date Feb 21, 1967
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3118388
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Patent number 3,118,388
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Issue date Jan 21, 1964
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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2934043
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Patent number 2,934,043
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Issue date Apr 26, 1960
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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2473271
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Patent number 2,473,271
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Issue date Jun 14, 1949
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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2426588
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Patent number 2,426,588
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Issue date Sep 2, 1947
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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2189773
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Patent number 2,189,773
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Issue date Feb 13, 1940
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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2006880
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Patent number 2,006,880
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Issue date Jul 2, 1935
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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1696139
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Patent number 1,696,139
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Issue date Dec 18, 1928
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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1575504
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Patent number 1,575,504
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Issue date Mar 2, 1926
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES