Jan M. Drees

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Dallas, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Compound hub spring system for helicopters
- Patent number 4,333,728
- Issue date Jun 8, 1982
- Textron, Inc.
- Jan M. Drees
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Hub spring moment isolation in underslung two-bladed teetering rotor
- Patent number 4,115,031
- Issue date Sep 19, 1978
- Textron, Inc.
- Jan M. Drees
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Helicopter rotor blade
- Patent number 4,022,546
- Issue date May 10, 1977
- Textron, Inc.
- Jan M. Drees
- B64 - AIRCRAFT AVIATION COSMONAUTICS