Growing community of inventors

Takatsuki, Japan

Kenji Sumiyama

Average Co-Inventor Count = 3.00

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 = 55

Kenji Sumiyama ↔ Kazumi Oishi (1 patent)Kenji Sumiyama ↔ Atsushi Kinoshita (1 patent)Kenji SumiyamaKenji Sumiyama (1 patent)Kazumi OishiKazumi Oishi (4 patents)Atsushi KinoshitaAtsushi Kinoshita (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Sunstar Kabushiki Kaisha (1 from 35 patents)


1 patent:

1. D359623 - Toothbrush

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as of
12/20/2025
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