William H. Colwill

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York, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Duplex turbine replacement unit and method
- Patent number 4,955,789
- Issue date Sep 11, 1990
- American Hydro Corporation
- Selim A. Chacour
- F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...