Volker W. Hafner

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Whittier, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Vacuum drainage system
- Patent number 6,990,993
- Issue date Jan 31, 2006
- Acorn Engineering Company
- Volker W. Hafner
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC

Patents Applicationslast 30 patents

Information Patent Application
Vacuum drainage system
- Publication number 20050072468
- Publication date Apr 7, 2005
- Acorn Engineering Company
- Volker W. Hafner
- E03 - WATER SUPPLY SEWERAGE