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Device for making artificial snow
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Patent number 4,915,302
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Issue date Apr 10, 1990
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Robert A. Kraus
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Device for making artificial snow
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Patent number 4,793,554
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Issue date Dec 27, 1988
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Edmund J. Kraus
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Device for making artificial snow
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Patent number 4,759,503
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Issue date Jul 26, 1988
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Edmund J. Kraus
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Torque release wrench
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Patent number 4,019,412
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Issue date Apr 26, 1977
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Robert A. Kraus
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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