Yoichi Yamakawa

Follow

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Combined unit of humidity indicator and desiccant pack
- Patent number 7,922,973
- Issue date Apr 12, 2011
- AP Tech Corp.
- Yoichi Yamakawa
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Humidity indicator
- Patent number 7,316,198
- Issue date Jan 8, 2008
- Yoichi Yamakawa
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
Combined unit of humidity indicator and desiccant pack
- Publication number 20090311140
- Publication date Dec 17, 2009
- Yoichi Yamakawa
- G01 - MEASURING TESTING
Information Patent Application
Humidity indicator
- Publication number 20070113775
- Publication date May 24, 2007
- Yoichi Yamakawa
- G01 - MEASURING TESTING