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Robert O. Duff

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  • Apple Valley, MN, US
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Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    DOORSTOP WITH A ROPE
    • Publication number 20240068279
    • Publication date Feb 29, 2024
    • Robert O. Duff
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Application

    DOORSTOP WITH REPLACEABLE PARTS
    • Publication number 20240068280
    • Publication date Feb 29, 2024
    • Robert O. Duff
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Application

    MOUNTING BRACKET
    • Publication number 20240068292
    • Publication date Feb 29, 2024
    • Robert O. Duff
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Application

    COMBINATION DOORBUMPER/DOORSTOPPER
    • Publication number 20160047157
    • Publication date Feb 18, 2016
    • Robert O. Duff
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES