Benjamin E. Andrews

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Chesapeake, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for cleaning ductwork
- Patent number 6,468,360
- Issue date Oct 22, 2002
- Benjamin Edward Andrews
- B08 - CLEANING

Patents Applicationslast 30 patents

Information Patent Application
Method for cleaning ductwork
- Publication number 20020139395
- Publication date Oct 3, 2002
- Benjamin E. Andrews
- B24 - GRINDING POLISHING