Richard S. Chen

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O'Fallon, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Interproximal dental strip
- Patent number 8,439,678
- Issue date May 14, 2013
- Richard S. Chen
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

Information Patent Application
PERSONAL TOILET SEAT COVER
- Publication number 20100205733
- Publication date Aug 19, 2010
- Richard S. Chen
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...