Growing community of inventors

Chiayi Hsien, Taiwan

Richard Chao

Average Co-Inventor Count = 1.20

ph-index = 9

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 = 340

Richard ChaoDavid Yinkai Chao (3 patents)Richard ChaoRichard Chao (9 patents)David Yinkai ChaoDavid Yinkai Chao (113 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Other (6 from 832,812 patents)

2. Contour Optik Inc. (3 from 33 patents)


9 patents:

1. 7399288 - Adjustable neck brace

2. 6367926 - Eye-wear with magnets

3. 6092896 - Eye-wear with magnets

4. 6012811 - Eyeglass frames with magnets at bridges for attachment

5. 5737054 - Auxiliary lenses for eyeglasses

6. 5682222 - Spectacle frame having magnetic coupling

7. 5627608 - Spectacle frame having resilient legs

8. 5592243 - Spectacle frame having gear coupling

9. 5568207 - Auxiliary lenses for eyeglasses

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idiyas.com
as of
12/18/2025
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