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William J. Friedman

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  • Big Prairie, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Holding tank vacuum relief
    • Patent number 6,234,197
    • Issue date May 22, 2001
    • Sealand Technology, Inc.
    • Edward McKiernan
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
  • Information Patent Grant

    Low odor permeable hose
    • Patent number 6,216,284
    • Issue date Apr 17, 2001
    • Sealand Technology, Inc.
    • Sally A. Kline
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Air pump for vacuum toilet systems
    • Patent number 6,082,979
    • Issue date Jul 4, 2000
    • Sealand Technology, Inc.
    • William J. Friedman
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Vacuum relief valve for sewage holding tank
    • Patent number 6,065,493
    • Issue date May 23, 2000
    • Sealand Technology, Inc.
    • William J. Friedman
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
  • Information Patent Grant

    Low odor permeable hose
    • Patent number 5,939,160
    • Issue date Aug 17, 1999
    • Sealand Technology, Inc.
    • Sally A. Kline
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Plastic combined vacuum and holding tank
    • Patent number 5,931,642
    • Issue date Aug 3, 1999
    • Sealand Technology, Inc.
    • William J. Friedman
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
  • Information Patent Grant

    Pulsation damper for marine tank pumpout systems
    • Patent number 5,860,799
    • Issue date Jan 19, 1999
    • Sealand Technology, Inc.
    • Mark E. Scheibe
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
  • Information Patent Grant

    Discharge hose adapter for boat holding tank
    • Patent number 5,806,454
    • Issue date Sep 15, 1998
    • Sealand Technology, Inc.
    • Edward McKiernan
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
  • Information Patent Grant

    Vacuum/holding tank
    • Patent number 5,681,148
    • Issue date Oct 28, 1997
    • Sealand Technology, Inc.
    • William J. Friedman
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
  • Information Patent Grant

    Vacuum tank construction for a vacuum toilet assembly
    • Patent number 5,621,924
    • Issue date Apr 22, 1997
    • Sealand Ttechnology, Inc.
    • William J. Friedman
    • E03 - WATER SUPPLY SEWERAGE