Martin Cempirek

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Karlsfeld, DE

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Patents Grantslast 30 patents

Information Patent Grant
Propfan engine having two oppositely rotating fan rotors
- Patent number 5,137,425
- Issue date Aug 11, 1992
- MTU Motoren und Turbinen-Union Muchen GmbH
- Alois Rohra
- B64 - AIRCRAFT AVIATION COSMONAUTICS