Growing community of inventors

Taichung, Taiwan

Ziv 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 = 13

Ziv ChangHung-Mao Liao (2 patents)Ziv ChangJoe Chen (2 patents)Ziv ChangNoel R Johnson (2 patents)Ziv ChangDerek L Nelson (2 patents)Ziv ChangZiv Chang (5 patents)Hung-Mao LiaoHung-Mao Liao (44 patents)Joe ChenJoe Chen (26 patents)Noel R JohnsonNoel R Johnson (23 patents)Derek L NelsonDerek L Nelson (12 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Johnson Health Tech Co., Ltd (5 from 114 patents)


5 patents:

1. 11998827 - Interactive exercise apparatus

2. 11517807 - Interactive exercise apparatus

3. 9724559 - Exercise apparatus

4. 9067094 - Exercise apparatus

5. 7591762 - Exercise apparatus

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as of
12/13/2025
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