Robert H. Romportl

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Spooner, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Concrete block technology
- Patent number 7,429,026
- Issue date Sep 30, 2008
- Robert H. Romportl
- B28 - WORKING CEMENT, CLAY, OR STONE

Patents Applicationslast 30 patents

Information Patent Application
Concrete block technology
- Publication number 20070125932
- Publication date Jun 7, 2007
- Robert H. Romportl
- B28 - WORKING CEMENT, CLAY, OR STONE