TREA

Jerzy Doerffer

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  • Polska, PL
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Patents Grantslast 30 patents

  • Information Patent Grant

    Free fall submersible life saving device for offshore structures
    • Patent number 4,822,311
    • Issue date Apr 18, 1989
    • Politechnika Gdanska
    • Jerzy W. Doerffer
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
  • Information Patent Grant

    Braking rudder device
    • Patent number 4,278,040
    • Issue date Jul 14, 1981
    • Politechnika Gdanska
    • Jerzy Doerffer
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
  • Information Patent Grant

    Stern braking device
    • Patent number 4,237,808
    • Issue date Dec 9, 1980
    • Politechnika Gdanska
    • Jerzy Doerffer
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT