Keith L. Burchett

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Golden Valley, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for actuating inner and outer forms of a concrete pipe fo...
- Patent number 4,153,232
- Issue date May 8, 1979
- C.S. Johnson Company
- Keith L. Burchett
- B28 - WORKING CEMENT, CLAY, OR STONE