David L. Groen

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Tooele, UT, US

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Patents Grantslast 30 patents

Information Patent Grant
Autogyro aircraft
- Patent number 5,544,844
- Issue date Aug 13, 1996
- Henry J. Groen
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Autogyro aircraft
- Patent number 5,304,036
- Issue date Apr 19, 1994
- Sego Tool, Incorporated
- Henry J. Groen
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Autogyro aircraft
- Patent number 5,301,900
- Issue date Apr 12, 1994
- Henry J. Groen
- B64 - AIRCRAFT AVIATION COSMONAUTICS