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Roger Lee Siferd

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  • Findlay, OH, US
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Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    APPARATUS AND METHOD FOR SEALING A VENTILATION CHANNEL OF A PIPE
    • Publication number 20110277908
    • Publication date Nov 17, 2011
    • Dave DOWNING
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Apparatus and Method For Sealing A Ventilation Channel of A Pipe
    • Publication number 20110277866
    • Publication date Nov 17, 2011
    • Advanced Drainage Systems, Inc.
    • Dave Downing
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Application

    Articulating pipe joint
    • Publication number 20060012166
    • Publication date Jan 19, 2006
    • Hancor, Inc.
    • Roger Lee Siferd
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Liquid control structure
    • Publication number 20050025573
    • Publication date Feb 3, 2005
    • John Jeffrey Waldman
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    Pipe structure and method of manufacture
    • Publication number 20040041302
    • Publication date Mar 4, 2004
    • Roger Lee Siferd
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Pipe structure and method of manufacture
    • Publication number 20010013372
    • Publication date Aug 16, 2001
    • Roger Lee Siferd
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Pipe structure and method of manufacture
    • Publication number 20010013673
    • Publication date Aug 16, 2001
    • Roger Lee Siferd
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL