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Switch controller
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Patent number 5,340,953
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Issue date Aug 23, 1994
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A-DEC, Inc.
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Paul B. Krebs
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Foot switch controller
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Patent number D343826
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Issue date Feb 1, 1994
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A-DEC, Inc.
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Paul B. Krebs
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D13 - Equipment for production, distribution, or transformation of energy
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Dental chair
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Patent number 5,190,349
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Issue date Mar 2, 1993
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A-DEC, Inc.
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George K. Austin
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE