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Melvin D. Plummer

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  • Los Angeles, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Break-away check valve
    • Patent number 11,767,923
    • Issue date Sep 26, 2023
    • HYDRANT GUARD LLC
    • Melvin D. Plummer
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Break-away check valve
    • Patent number 11,187,332
    • Issue date Nov 30, 2021
    • Melvin Plummer
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Backflow and breakaway check valve
    • Patent number 10,060,101
    • Issue date Aug 28, 2018
    • Melvin Plummer
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Dual plate backflow and breakaway check valve
    • Patent number 9,353,878
    • Issue date May 31, 2016
    • Melvin Plummer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Stud climbing/support device
    • Patent number 4,969,620
    • Issue date Nov 13, 1990
    • Melvin D. Plummer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS

Patents Applicationslast 30 patents

  • Information Patent Application

    BREAK-AWAY CHECK VALVE
    • Publication number 20220205547
    • Publication date Jun 30, 2022
    • Melvin D. PLUMMER
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Application

    BREAK-AWAY CHECK VALVE
    • Publication number 20200326001
    • Publication date Oct 15, 2020
    • Melvin Plummer
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Application

    BACKFLOW AND BREAKAWAY CHECK VALVE
    • Publication number 20170307097
    • Publication date Oct 26, 2017
    • Melvin Plummer
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Application

    DUAL PLATE BACKFLOW AND BREAKAWAY CHECK VALVE
    • Publication number 20150240962
    • Publication date Aug 27, 2015
    • Melvin Plummer
    • E03 - WATER SUPPLY SEWERAGE