TREA

Claus Kruppa

Follow

Person

  • Berlin, DE
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Adjustable propeller
    • Patent number 4,973,225
    • Issue date Nov 27, 1990
    • Claus Kruppa
    • B64 - AIRCRAFT AVIATION COSMONAUTICS
  • Information Patent Grant

    Marine vessel with propeller
    • Patent number 4,371,350
    • Issue date Feb 1, 1983
    • Escher Wyss GmbH
    • Claus Kruppa
    • B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT