Townsend L. Schoonmaker

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San Rafael, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Fixed dredge cleanout means
- Patent number 4,147,450
- Issue date Apr 3, 1979
- Townsend L. Schoonmaker
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Self-cleaning fixed dredge
- Patent number 4,074,535
- Issue date Feb 21, 1978
- Townsend L. Schoonmaker
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING