TREA

Sven Oldfelt

Follow

Person

  • Vaxholm, SE
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Vacuum toilet system with treated rinse liquid
    • Patent number 5,692,250
    • Issue date Dec 2, 1997
    • Oy Wartsila AB
    • Sven Oldfelt
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Vacuum toilet system
    • Patent number 5,454,936
    • Issue date Oct 3, 1995
    • Oy Wartsila AB
    • Arne Ask
    • B64 - AIRCRAFT AVIATION COSMONAUTICS
  • Information Patent Grant

    Vacuum toilet system
    • Patent number 5,421,040
    • Issue date Jun 6, 1995
    • Metra Oy AB
    • Sven Oldfelt
    • B64 - AIRCRAFT AVIATION COSMONAUTICS
  • Information Patent Grant

    Vacuum toilet system
    • Patent number 5,245,711
    • Issue date Sep 21, 1993
    • Oy Wartsila AB
    • Sven Oldfelt
    • B64 - AIRCRAFT AVIATION COSMONAUTICS
  • Information Patent Grant

    Vacuum sewer arrangement
    • Patent number 5,165,457
    • Issue date Nov 24, 1992
    • Oy Wartsila AB
    • Henry Olin
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Vacuum toilet system with simultaneous rinse and discharge
    • Patent number 5,007,117
    • Issue date Apr 16, 1991
    • Oy Wartsila AB
    • Sven Oldfelt
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Waste tank for a vacuum sewage system
    • Patent number 5,002,592
    • Issue date Mar 26, 1991
    • Oy Wartsila AB
    • Lennart Stroby
    • B64 - AIRCRAFT AVIATION COSMONAUTICS
  • Information Patent Grant

    Vacuum sewer arrangement
    • Patent number 4,928,326
    • Issue date May 29, 1990
    • Oy Wartsila AB
    • Henry Olin
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Vacuum toilet system
    • Patent number 4,713,847
    • Issue date Dec 22, 1987
    • Oy Wartsila AB
    • Sven Oldfelt
    • B64 - AIRCRAFT AVIATION COSMONAUTICS
  • Information Patent Grant

    Land drainage system
    • Patent number 4,704,047
    • Issue date Nov 3, 1987
    • Oy Wartsila AB
    • Sven Oldfelt
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES