Zhang-Ming Chang

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Taichung, TW

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Patents Grantslast 30 patents

Information Patent Grant
Binoculars rangefinder
- Patent number 10,234,283
- Issue date Mar 19, 2019
- Sintai Optical (Shenzhen) Co., Ltd.
- Zhang-Ming Chang
- G02 - OPTICS
Information Patent Grant
Rangefinder
- Patent number 8,970,824
- Issue date Mar 3, 2015
- Asia Optical Co., Inc.
- Zhang-Ming Chang
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
Binoculars Rangefinder
- Publication number 20160187131
- Publication date Jun 30, 2016
- Asia Optical International Ltd.
- Zhang-Ming Chang
- G01 - MEASURING TESTING
Information Patent Application
RANGEFINDER
- Publication number 20130148096
- Publication date Jun 13, 2013
- Asia Optical Co., Inc.
- Zhang-Ming Chang
- G01 - MEASURING TESTING