Walter Campbell

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Fairfield, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Curb drain block
- Patent number 9,528,226
- Issue date Dec 27, 2016
- Walter Campbell
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES

Patents Applicationslast 30 patents

Information Patent Application
CURB DRAIN BLOCK
- Publication number 20160060818
- Publication date Mar 3, 2016
- Walter Campbell
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES