David James Beckham

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Vancouver, CA

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Patents Grantslast 30 patents

Information Patent Grant
Concrete recovery system
- Patent number 6,682,655
- Issue date Jan 27, 2004
- Knelson Patents Inc.
- David James Beckham
- B28 - WORKING CEMENT, CLAY, OR STONE

Patents Applicationslast 30 patents

Information Patent Application
Concrete recovery system
- Publication number 20020108537
- Publication date Aug 15, 2002
- David James Beckham
- B28 - WORKING CEMENT, CLAY, OR STONE