Growing community of inventors

Fukuyama, Japan

Hisami Tokunaga

Average Co-Inventor Count = 5.00

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 = 5

Hisami Tokunaga ↔ Yutaka Nakano (1 patent)Hisami Tokunaga ↔ Naoaki Sasaki (1 patent)Hisami Tokunaga ↔ Ryoichiro Imai (1 patent)Hisami Tokunaga ↔ Takao Kawawa (1 patent)Hisami TokunagaHisami Tokunaga (1 patent)Yutaka NakanoYutaka Nakano (2 patents)Naoaki SasakiNaoaki Sasaki (2 patents)Ryoichiro ImaiRyoichiro Imai (1 patent)Takao KawawaTakao Kawawa (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Nippon Kokan Kabushiki Kaisha (1 from 487 patents)

2. Osaka Oxygen Industries, Ltd. (1 from 8 patents)


1 patent:

1. 4141812 - Oxygen sensors

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as of
12/9/2025
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