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Wrench openings
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Patent number 5,092,203
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Issue date Mar 3, 1992
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Easco Hand Tools, Inc.
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William G. Mader
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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-
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Disc brake pad spreader
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Patent number 4,086,828
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Issue date May 2, 1978
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K-D Manufacturing Company
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William G. Mader
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B60 - VEHICLES IN GENERAL
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Foot control for dental equipment
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Patent number 4,041,609
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Issue date Aug 16, 1977
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Dentsply Research & Development Corporation
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Robert A. Bresnahan
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Operatory chair operating mechanism
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Patent number 3,982,718
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Issue date Sep 28, 1976
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Dentsply Research & Development Corporation
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Richard P. Folkenroth
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE