Robert C. Williams

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Orting, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Grate lock device
- Patent number 4,257,193
- Issue date Mar 24, 1981
- Robert C. Williams
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Catch basin grate and receiving frame locking assembly
- Patent number 4,142,329
- Issue date Mar 6, 1979
- Robert C. Williams
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING