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Richard D. Williamson

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  • New Brighton, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Plenum/plug fan assembly
    • Patent number 8,025,477
    • Issue date Sep 27, 2011
    • Twin City Fan Companies, Ltd.
    • Radha K. Ganesh
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Fan wheel for a fan or blower assembly
    • Patent number 5,171,128
    • Issue date Dec 15, 1992
    • Twin City Fan & Blower Co.
    • Richard D. Williamson
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

  • Information Patent Application

    Plenum/Plug Fan Assembly
    • Publication number 20080166223
    • Publication date Jul 10, 2008
    • TWIN CITY FAN COMPANIES, LTD.
    • Radha K. Ganesh
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Self-tensioning drive assembly configuration & methodology
    • Publication number 20040254037
    • Publication date Dec 16, 2004
    • Scott A. Williamson
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...