Growing community of inventors

Hachioji, Japan

Tamotsu Koyama

Average Co-Inventor Count = 6.88

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 = 4

Tamotsu KoyamaYuji Makino (2 patents)Tamotsu KoyamaAtsuo Hazato (2 patents)Tamotsu KoyamaNobuaki Hanajima (2 patents)Tamotsu KoyamaToshiaki Takeda (2 patents)Tamotsu KoyamaToshio Tanaka (1 patent)Tamotsu KoyamaSeizi Kurozumi (1 patent)Tamotsu KoyamaTakehisa Hata (1 patent)Tamotsu KoyamaYoshinori Kato (1 patent)Tamotsu KoyamaKiyoshi Bannai (1 patent)Tamotsu KoyamaSaburo Murata (1 patent)Tamotsu KoyamaSumihisa Kimura (1 patent)Tamotsu KoyamaAkira Ohtsu (1 patent)Tamotsu KoyamaYoshio Mori (1 patent)Tamotsu KoyamaSatoshi Asano (1 patent)Tamotsu KoyamaMakoto Ogawa (1 patent)Tamotsu KoyamaTamotsu Koyama (3 patents)Yuji MakinoYuji Makino (28 patents)Atsuo HazatoAtsuo Hazato (25 patents)Nobuaki HanajimaNobuaki Hanajima (3 patents)Toshiaki TakedaToshiaki Takeda (2 patents)Toshio TanakaToshio Tanaka (44 patents)Seizi KurozumiSeizi Kurozumi (35 patents)Takehisa HataTakehisa Hata (18 patents)Yoshinori KatoYoshinori Kato (13 patents)Kiyoshi BannaiKiyoshi Bannai (11 patents)Saburo MurataSaburo Murata (6 patents)Sumihisa KimuraSumihisa Kimura (6 patents)Akira OhtsuAkira Ohtsu (5 patents)Yoshio MoriYoshio Mori (2 patents)Satoshi AsanoSatoshi Asano (1 patent)Makoto OgawaMakoto Ogawa (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Teijin Limited (3 from 1,586 patents)


3 patents:

1. 5656663 - External skin treatment agent composition containing isocarbacyclins as

2. 5530027 - External skin treatment agent composition containing prostacyclins as

3. 5364883 - Isocarbocyclins for the treatment of liver and kidney diseases

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as of
12/5/2025
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