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Sunnyvale, CA, United States of America

Jack H Chang

Average Co-Inventor Count = 2.00

ph-index = 3

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 280

Jack H ChangRaymond L Tong (5 patents)Jack H ChangJack H Chang (5 patents)Raymond L TongRaymond L Tong (6 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Carmel Connection, Inc. (3 from 3 patents)

2. Calumet Keweenaw LLC (2 from 2 patents)


5 patents:

1. 7177908 - System and method for managing multimedia messaging platforms

2. 7010574 - System and method for managing multimedia messaging platforms

3. 6381633 - System and method for managing multimedia messaging platforms

4. 6118864 - System and method for providing communication on a wide area network

5. 5974449 - Apparatus and method for providing multimedia messaging between

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