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Pneumatic drill
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Patent number 5,040,618
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Issue date Aug 20, 1991
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Cannon Industries, Inc.
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Ward D. Morrison
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Pneumatic drill
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Patent number 4,957,171
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Issue date Sep 18, 1990
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Cannon Industries, Inc.
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Ward D. Morrison
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Fluid motor
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Patent number 4,196,655
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Issue date Apr 8, 1980
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Joy Manufacturing Company
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Louis H. LeBlanc
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS