Growing community of inventors

Kanagawa, Japan

Tomoharu Ashikawa

Average Co-Inventor Count = 6.00

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 = 28

Tomoharu Ashikawa ↔ Takashi Shima (1 patent)Tomoharu Ashikawa ↔ Shunichi Tomizuka (1 patent)Tomoharu Ashikawa ↔ Yasuo Takenaka (1 patent)Tomoharu Ashikawa ↔ Katuro Takasawa (1 patent)Tomoharu Ashikawa ↔ Taro Tsujimura (1 patent)Tomoharu AshikawaTomoharu Ashikawa (1 patent)Takashi ShimaTakashi Shima (9 patents)Shunichi TomizukaShunichi Tomizuka (2 patents)Yasuo TakenakaYasuo Takenaka (2 patents)Katuro TakasawaKaturo Takasawa (1 patent)Taro TsujimuraTaro Tsujimura (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. The Japan Steel Works, Ltd. (1 from 406 patents)

2. Japanese National Railways (1 from 50 patents)


1 patent:

1. 4760900 - Friction brakes

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as of
12/13/2025
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