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Method for loosening jack bolts
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Patent number 5,075,950
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Issue date Dec 31, 1991
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Rolf H. Steinbock
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Threaded type fastener
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Patent number 4,923,323
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Issue date May 8, 1990
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Rolf H. Steinbock
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Variable compression engine
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Patent number 4,104,995
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Issue date Aug 8, 1978
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Rolf Steinbock
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Tandem rolling mill arrangement
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Patent number 3,945,234
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Issue date Mar 23, 1976
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Rolf Steinbock
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...