Growing community of inventors

Tokyo, Japan

Takayoshi Ishigami

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 = 3

Takayoshi Ishigami ↔ Osamu Shiromaru (1 patent)Takayoshi Ishigami ↔ Toshio Oshiba (1 patent)Takayoshi Ishigami ↔ Yoshinori Kawashima (1 patent)Takayoshi IshigamiTakayoshi Ishigami (1 patent)Osamu ShiromaruOsamu Shiromaru (7 patents)Toshio OshibaToshio Oshiba (3 patents)Yoshinori KawashimaYoshinori Kawashima (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Toyo Ink Manufacturing Company (1 from 223 patents)


1 patent:

1. 6692559 - Pigment yellow 74 and printing ink composition

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as of
12/18/2025
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