Hai-Hua Chen

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Hang-zhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Laser distance-measuring device
- Patent number 7,304,727
- Issue date Dec 4, 2007
- Asia Optical Co., Inc.
- Pie-Yau Chien
- G01 - MEASURING TESTING
Information Patent Grant
Optical axis adjusting device for use in a laser ruler
- Patent number 7,237,342
- Issue date Jul 3, 2007
- Asia Optical Co., Inc.
- Hai-hau Chen
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
MECHANICAL CRYOGENIC TEMPERATURE SENSOR AND ACTUATOR
- Publication number 20220206516
- Publication date Jun 30, 2022
- L'air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation Des Procedes Ge...
- Ren Chen
- G05 - CONTROLLING REGULATING
Information Patent Application
Laser distance-measuring device
- Publication number 20060268261
- Publication date Nov 30, 2006
- Asia Optical Co., Inc.
- Pie-Yau Chien
- G01 - MEASURING TESTING