Kiyotaka Sakai

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Double wire cord and portable audio device using the same
- Patent number 7,348,490
- Issue date Mar 25, 2008
- SDK Company
- Kiyotaka Sakai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
CORD
- Publication number 20100307789
- Publication date Dec 9, 2010
- SDK Company Limited
- Kiyotaka Sakai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Double wire cord and portable audio device using the same
- Publication number 20070277995
- Publication date Dec 6, 2007
- SDK Company Limited
- Kiyotaka Sakai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE