Cao P. Sheng

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Shanghai, CN

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Patents Grantslast 30 patents

Information Patent Grant
Non-linear electromagnetic vibration device
- Patent number 4,749,891
- Issue date Jun 7, 1988
- Cao P. Sheng
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Non-linear electromagnetic vibration fluid compression device
- Patent number 4,743,178
- Issue date May 10, 1988
- Cao P. Sheng
- B28 - WORKING CEMENT, CLAY, OR STONE