Changsong Jiang

Follow

Person

Guilin, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Digital protractor
- Patent number D610477
- Issue date Feb 23, 2010
- Guangjin Li
- D10 - Measuring, testing, or signalling instruments
Information Patent Grant
Digital protractor
- Patent number D568772
- Issue date May 13, 2008
- Guilin Gemred Sensor Technology Ltd.
- Guangjin Li
- D10 - Measuring, testing, or signalling instruments

Patents Applicationslast 30 patents

Information Patent Application
DIGITAL ANGLE MEASURING DEVICE
- Publication number 20100043243
- Publication date Feb 25, 2010
- Guangjin LI
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES