Growing community of inventors

Ibaraki, Japan

Toshiyuki Koyama

Average Co-Inventor Count = 7.00

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

Toshiyuki Koyama ↔ Akira Itsubo (1 patent)Toshiyuki Koyama ↔ Toshiaki Ishibashi (1 patent)Toshiyuki Koyama ↔ Junko Gouda (1 patent)Toshiyuki Koyama ↔ Toyoshi Ohashi (1 patent)Toshiyuki Koyama ↔ Masatomi Ozawa (1 patent)Toshiyuki Koyama ↔ Katsutosi Iijima (1 patent)Toshiyuki KoyamaToshiyuki Koyama (1 patent)Akira ItsuboAkira Itsubo (7 patents)Toshiaki IshibashiToshiaki Ishibashi (2 patents)Junko GoudaJunko Gouda (2 patents)Toyoshi OhashiToyoshi Ohashi (2 patents)Masatomi OzawaMasatomi Ozawa (1 patent)Katsutosi IijimaKatsutosi Iijima (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Mitsubishi Petrochemical Company Limited (1 from 546 patents)


1 patent:

1. 5283146 - Photoconductive phthalocyanine composition

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as of
12/11/2025
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