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Retractor structure
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Patent number 4,777,939
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Issue date Oct 18, 1988
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George Kees Research & Development Co., Inc.
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George Kees
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Surgical head clamp
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Patent number 4,169,478
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Issue date Oct 2, 1979
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Ohio Medical Instrument Company, Inc.
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Horst R. Hickmann
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Bracket for an operating table
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Patent number 4,018,412
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Issue date Apr 19, 1977
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Kees Surgical Specialty Company
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George Kees
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE