Guoqing Zhang

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Patents Grantslast 30 patents

Information Patent Grant
Quartz resonating piece, quartz resonator, and quartz device
- Patent number 6,849,991
- Issue date Feb 1, 2005
- Seiko Epson Corporation
- Guoqing Zhang
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
Quartz resonating piece, quartz resonator, and quartz device
- Publication number 20030218512
- Publication date Nov 27, 2003
- SEIKO EPSON CORPORATION
- Guoqing Zhang
- H03 - BASIC ELECTRONIC CIRCUITRY