Growing community of inventors

Hsinchu, Taiwan

Yi-Chih Chang

Average Co-Inventor Count = 1.50

ph-index = 1

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 = 3

Yi-Chih ChangChia-Jui Yeh (3 patents)Yi-Chih ChangYing-Hwa Tang (2 patents)Yi-Chih ChangJu-Ming Lin (1 patent)Yi-Chih ChangYi-Chih Chang (8 patents)Chia-Jui YehChia-Jui Yeh (32 patents)Ying-Hwa TangYing-Hwa Tang (2 patents)Ju-Ming LinJu-Ming Lin (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Waltop International Corporation (8 from 58 patents)


8 patents:

1. 11023057 - Stylus structure having a barrier unit for contacting with a trigger component

2. 10895930 - Message erasing device and message erasing system

3. 10613647 - Portable electronic device and stylus thereof

4. 10599272 - Portable electronic device and active capacitive stylus thereof

5. 10564737 - Capacitive stylus with eraser

6. 10429956 - Capacitive stylus with detachable eraser

7. 10042444 - Capacitive stylus with two transmit electrodes

8. 9703401 - Portable electronic device and miniaturization rechargeable capacitive stylus thereof

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as of
12/9/2025
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