James L. Chao

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Fremont, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Perpendicular magnetic recording disk with a soft magnetic layer ha...
- Patent number 7,656,615
- Issue date Feb 2, 2010
- WD Media, Inc.
- David E. Wachenschwanz
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Perpendicular magnetic discrete track recording disk
- Patent number 7,608,193
- Issue date Oct 27, 2009
- WD Media, Inc.
- David E. Wachenschwanz
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method of fabricating a magnetic discrete track recording disk
- Patent number 7,549,209
- Issue date Jun 23, 2009
- WD Media, Inc.
- David E. Wachenschwanz
- G11 - INFORMATION STORAGE
Information Patent Grant
Perpendicular magnetic discrete track recording disk
- Patent number 7,147,790
- Issue date Dec 12, 2006
- Komag, Inc.
- David E. Wachenschwanz
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
Perpendicular magnetic discrete track recording disk
- Publication number 20070041306
- Publication date Feb 22, 2007
- David E. Wachenschwanz
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
Perpendicular magnetic discrete track recording disk
- Publication number 20070039922
- Publication date Feb 22, 2007
- David E. Wachenschwanz
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
Magnetic discrete track recording disk
- Publication number 20050120545
- Publication date Jun 9, 2005
- David E. Wachenschwanz
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic discrete track recording disk
- Publication number 20050036223
- Publication date Feb 17, 2005
- David E. Wachenschwanz
- G11 - INFORMATION STORAGE
Information Patent Application
Perpendicular magnetic discrete track recording disk
- Publication number 20040101713
- Publication date May 27, 2004
- David E. Wachenschwanz
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL