William H. Cook

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Springfield, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Automatic back water valve system
- Patent number 6,131,595
- Issue date Oct 17, 2000
- William H. Cook
- E03 - WATER SUPPLY SEWERAGE
Information Patent Grant
Automatic back water valve system
- Patent number 5,875,813
- Issue date Mar 2, 1999
- William H. Cook
- E03 - WATER SUPPLY SEWERAGE
Information Patent Grant
Automatic back water valve system
- Patent number 5,538,032
- Issue date Jul 23, 1996
- William H. Cook
- E03 - WATER SUPPLY SEWERAGE