TREA

Sanford F. Campbell

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  • Redding, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Variable output pressure backup valve
    • Patent number 7,726,342
    • Issue date Jun 1, 2010
    • Pentair Water Pool and Spa, Inc.
    • Sanford F. Campbell
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Variable output pressure backup valve
    • Patent number 7,373,948
    • Issue date May 20, 2008
    • Pentair Water Pool and Spa, Inc.
    • Sanford F. Campbell
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Pool cleaner debris bag
    • Patent number 6,802,963
    • Issue date Oct 12, 2004
    • Pentair Pool Products, Inc.
    • Sanford F. Campbell
    • E04 - BUILDING
  • Information Patent Grant

    Truck swimming pool cleaner
    • Patent number D489150
    • Issue date Apr 27, 2004
    • Pentair Pool Products, Inc.
    • Sanford F. Campbell
    • D32 - Washing, cleaning, or drying machine
  • Information Patent Grant

    Pool cleaning apparatus with adjustable bumper assembly
    • Patent number 6,625,833
    • Issue date Sep 30, 2003
    • Pentair Pool Products, Inc.
    • Sanford F. Campbell
    • E04 - BUILDING
  • Information Patent Grant

    Automatic swimming pool cleaner
    • Patent number D471330
    • Issue date Mar 4, 2003
    • Letro Products, Inc.
    • Sanford F. Campbell
    • D32 - Washing, cleaning, or drying machine
  • Information Patent Grant

    Pool cleaner having vortex drive tube
    • Patent number 6,423,217
    • Issue date Jul 23, 2002
    • Letro Products, Inc.
    • Sanford F. Campbell
    • E04 - BUILDING
  • Information Patent Grant

    Pool cleaner with righting weight assembly
    • Patent number 6,379,542
    • Issue date Apr 30, 2002
    • Letro Products, Inc.
    • Sanford F. Campbell
    • E04 - BUILDING
  • Information Patent Grant

    Suction flow regulator
    • Patent number 6,357,478
    • Issue date Mar 19, 2002
    • Letro Products, Inc.
    • Sanford Campbell
    • E04 - BUILDING
  • Information Patent Grant

    Pool cleaner debris bag
    • Patent number 6,193,885
    • Issue date Feb 27, 2001
    • Letro Products, Inc.
    • Sanford F. Campbell
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Low pressure back-up valve for pool cleaner
    • Patent number 6,158,464
    • Issue date Dec 12, 2000
    • Letro Products, Inc.
    • Sanford F. Campbell
    • E04 - BUILDING
  • Information Patent Grant

    Traction enhanced wheel apparatus
    • Patent number 6,099,091
    • Issue date Aug 8, 2000
    • Letro Products, Inc.
    • Sanford F. Campbell
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Automatic fill valve assembly
    • Patent number 6,035,879
    • Issue date Mar 14, 2000
    • Letro Products, Inc.
    • Sanford F. Campbell
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Automatic swimming pool cleaner
    • Patent number D421512
    • Issue date Mar 7, 2000
    • Letro Products, Inc.
    • Sanford F. Campbell
    • D32 - Washing, cleaning, or drying machine
  • Information Patent Grant

    Automatic swimming pool cleaner
    • Patent number 6,003,184
    • Issue date Dec 21, 1999
    • Letro Products, Inc.
    • Sanford F. Campbell
    • E04 - BUILDING
  • Information Patent Grant

    Low pressure automatic swimming pool cleaner
    • Patent number 5,933,899
    • Issue date Aug 10, 1999
    • Letro Products, Inc.
    • Sanford F. Campbell
    • E04 - BUILDING
  • Information Patent Grant

    Automatic swimming pool cleaner
    • Patent number 5,893,188
    • Issue date Apr 13, 1999
    • Letro Products, Inc.
    • Sanford F. Campbell
    • E04 - BUILDING
  • Information Patent Grant

    Pool cleaner debris bag
    • Patent number D379693
    • Issue date Jun 3, 1997
    • Letro Products, Inc.
    • Sanford F. Campbell
    • D32 - Washing, cleaning, or drying machine
  • Information Patent Grant

    Pool cleaner with replaceable mast
    • Patent number 5,603,135
    • Issue date Feb 18, 1997
    • Letro Products, Inc.
    • Robert E. Jones
    • E04 - BUILDING
  • Information Patent Grant

    Swimming pool cleaner
    • Patent number D376450
    • Issue date Dec 10, 1996
    • Letro Products, Inc.
    • Sanford F. Campbell
    • D32 - Washing, cleaning, or drying machine
  • Information Patent Grant

    Pool cleaner
    • Patent number 5,077,853
    • Issue date Jan 7, 1992
    • Sanford F. Campbell
    • E04 - BUILDING
  • Information Patent Grant

    Pool sweep bag
    • Patent number 4,856,913
    • Issue date Aug 15, 1989
    • Sanford F. Campbell
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Pool sweep modifications
    • Patent number 4,784,171
    • Issue date Nov 15, 1988
    • Sanford F. Campbell
    • E04 - BUILDING

Patents Applicationslast 30 patents