Growing community of inventors

Kazo, Japan

Keiichi Sugiyama

Average Co-Inventor Count = 1.20

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 = 28

Keiichi SugiyamaAzuma Murakami (1 patent)Keiichi SugiyamaKeiichi Sugiyama (3 patents)Azuma MurakamiAzuma Murakami (24 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Wacom Co., Ltd. (3 from 1,257 patents)


3 patents:

1. 6075468 - Angle information input apparatus

2. 6075521 - Coordinate input device

3. 5706028 - Position indicator

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as of
1/5/2026
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