Growing community of inventors

Hsinchu, Taiwan

Thomas Chang

Average Co-Inventor Count = 2.15

ph-index = 8

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 = 202

Thomas Chang ↔ Tony H Chen (18 patents)Thomas Chang ↔ Jesse Wu (4 patents)Thomas Chang ↔ Chia-Lien Hung (1 patent)Thomas ChangThomas Chang (19 patents)Tony H ChenTony H Chen (30 patents)Jesse WuJesse Wu (5 patents)Chia-Lien HungChia-Lien Hung (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Umax Data Systems, Inc. (13 from 157 patents)

2. Umax Data System Inc. (6 from 22 patents)


19 patents:

1. D413584 - Scanner

2. D405067 - Scanner

3. D405068 - Scanner

4. D405069 - Scanner

5. D397096 - Paper delivering scanner

6. D397106 - Slide scanner cover

7. D396704 - Visual image scanner

8. D394429 - Paper delivering scanner

9. D389468 - Wave shaped scanner

10. D388773 - Scanner

11. D388067 - Video frame grabber

12. D382857 - Mini computer video information converter

13. D377168 - Visual image scanner

14. D370893 - Image scanner

15. D370667 - Computer image converter

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as of
12/22/2025
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