Gerald A. Rauenhorst

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Minneapolis, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Hollow-core concrete slabs and the method of making the same
- Patent number 4,141,946
- Issue date Feb 27, 1979
- Gerald A. Rauenhorst
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Hollow-core concrete slabs
- Patent number 4,041,669
- Issue date Aug 16, 1977
- Gerald A. Rauenhorst
- B28 - WORKING CEMENT, CLAY, OR STONE