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Prosthetic ligament
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Patent number 4,932,972
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Issue date Jun 12, 1990
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Richards Medical Company
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Richard L. Dunn
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Phosthetic ligament
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Patent number 4,790,850
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Issue date Dec 13, 1988
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Richards Medical Company
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Richard L. Dunn
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Middle ear ventilating tube
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Patent number 4,744,792
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Issue date May 17, 1988
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Richards Medical Company
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Thomas W. Sander
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Prosthetic ligament
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Patent number 4,731,084
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Issue date Mar 15, 1988
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Richards Medical Company
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Richard L. Dunn
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE