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Reciprocating linear fluid motor
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Patent number 4,552,227
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Issue date Nov 12, 1985
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The Stanley Works
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Maurice Wohlwend
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Reciprocating linear fluid motor
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Patent number 4,466,493
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Issue date Aug 21, 1984
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HED Corporation
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Maurice Wohlwend
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Percussion tool
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Patent number 4,133,394
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Issue date Jan 9, 1979
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Maurice Wohlwend
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Swivel type fluid coupling
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Patent number 3,981,329
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Issue date Sep 21, 1976
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Maurice Wohlwend
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING