Growing community of inventors

Yokohama, Japan

Shiro Irisa

Average Co-Inventor Count = 4.00

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 = 2

Shiro Irisa ↔ Eiji Takahashi (69 patents)Shiro Irisa ↔ Masahiko Yamaguchi (1 patent)Shiro Irisa ↔ Eiji Takahashi (1 patent)Shiro Irisa ↔ Katsumasa Kikkawa (1 patent)Shiro IrisaShiro Irisa (1 patent)Eiji TakahashiEiji Takahashi (69 patents)Masahiko YamaguchiMasahiko Yamaguchi (17 patents)Eiji TakahashiEiji Takahashi (15 patents)Katsumasa KikkawaKatsumasa Kikkawa (7 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hodogaya Chemical Co., Ltd. (1 from 328 patents)


1 patent:

1. 8118881 - Hair dye and hair dye composition

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as of
12/6/2025
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