Walter B. Hahne

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Corona del Mar, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Highway barrier with level internal ducts and construction method
- Patent number 4,641,993
- Issue date Feb 10, 1987
- Associated Concrete Products
- Walter B. Hahne
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Utility vault cover seal
- Patent number 4,567,697
- Issue date Feb 4, 1986
- Walter B. Hahne
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING