Growing community of inventors

Kitakyushu, Japan

Takafumi Oshima

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 = 8

Takafumi Oshima ↔ Toshiharu Otsuka (1 patent)Takafumi Oshima ↔ Toshio Eki (1 patent)Takafumi Oshima ↔ Akemi Kuroda (1 patent)Takafumi OshimaTakafumi Oshima (1 patent)Toshiharu OtsukaToshiharu Otsuka (27 patents)Toshio EkiToshio Eki (6 patents)Akemi KurodaAkemi Kuroda (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Toto Ltd. (1 from 1,192 patents)


1 patent:

1. 5846390 - Non-membrane water electrolyzer

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12/20/2025
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