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Alvin E. Parkes

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  • Lewisburg, WV, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Scavenging valve device
    • Patent number 4,112,940
    • Issue date Sep 12, 1978
    • The Raymond Lee Organization, Inc.
    • Alvin E. Parkes
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE