Growing community of inventors

Hong Kong, China

Chan Kei Shek

Average Co-Inventor Count = 3.00

ph-index = 2

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 = 139

Chan Kei ShekMichael John Hammond (2 patents)Chan Kei ShekAndrew John Riggs (2 patents)Chan Kei ShekChan Kei Shek (2 patents)Michael John HammondMichael John Hammond (16 patents)Andrew John RiggsAndrew John Riggs (14 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Mattel, Inc. (2 from 1,703 patents)


2 patents:

1. 7976385 - Game controller with sensitivity adjustment

2. 7758424 - Game controller with interchangeable controls

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as of
1/3/2026
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