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Auxiliary handle
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Patent number 5,400,471
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Issue date Mar 28, 1995
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Rad-Cam, Inc.
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William H. Lichfield
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Spray wand
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Patent number 4,834,293
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Issue date May 30, 1989
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William H. Lichfield
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B60 - VEHICLES IN GENERAL
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Safety spray wand
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Patent number 4,541,568
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Issue date Sep 17, 1985
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William H. Lichfield
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B60 - VEHICLES IN GENERAL
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Grinding mill
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Patent number 4,109,873
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Issue date Aug 29, 1978
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William H. Lichfield
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...