Hao-Jan Chang

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San Jose, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Visible multiple codes system
- Patent number 9,827,780
- Issue date Nov 28, 2017
- Hao-Jan Chang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Visible multiple codes system, method and apparatus
- Patent number 9,794,448
- Issue date Oct 17, 2017
- Hao-Jan Chang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of making high density recording medium having a non-magneti...
- Patent number 6,433,964
- Issue date Aug 13, 2002
- Hao-jan Chang
- G11 - INFORMATION STORAGE
Information Patent Grant
High density recording medium having a non-magnetic, metallic layer...
- Patent number 6,144,525
- Issue date Nov 7, 2000
- Hao-jan Chang
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
VISIBLE MULTIPLE CODES SYSTEM
- Publication number 20170142291
- Publication date May 18, 2017
- Hao-Jan Chang
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS