Don J. Marshall

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Churchton, MD, US

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Patents Grantslast 30 patents

Information Patent Grant
Variable pitch marine propeller
- Patent number 4,297,079
- Issue date Oct 27, 1981
- Goodall SemiMetallic Hose & Mfg. Co.
- Don J. Marshall
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT