Peter Edington Ellen

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Wanchi, HK

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for mixing cementitious materials having a cyc...
- Patent number 6,481,883
- Issue date Nov 19, 2002
- Pei Technology Inc.
- Peter Edington Ellen
- B28 - WORKING CEMENT, CLAY, OR STONE