Growing community of inventors

Tokyo, Japan

Seiji Iwasa

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 = 3

Seiji Iwasa ↔ Toshinori Asahi (1 patent)Seiji Iwasa ↔ Masami Kozaki (1 patent)Seiji Iwasa ↔ Shohei Chida (1 patent)Seiji Iwasa ↔ Chiyoaki Ono (1 patent)Seiji Iwasa ↔ Taizou Fukunaga (1 patent)Seiji Iwasa ↔ Moriyuki Takemura (1 patent)Seiji IwasaSeiji Iwasa (1 patent)Toshinori AsahiToshinori Asahi (2 patents)Masami KozakiMasami Kozaki (1 patent)Shohei ChidaShohei Chida (1 patent)Chiyoaki OnoChiyoaki Ono (1 patent)Taizou FukunagaTaizou Fukunaga (1 patent)Moriyuki TakemuraMoriyuki Takemura (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kabushiki Kaisha Kobe Seiko Sho (1 from 1,100 patents)

2. Nittoku Kensetsu Kabushiki Kaisha (1 from 2 patents)

3. Nippon Hyumukan Kabushiki Kaisha (1 from 1 patent)

4. Zaidan Hohjin Doboku Kenkyu Center (1 from 1 patent)


1 patent:

1. 4998776 - Shield tunneling with optional section and machine

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as of
1/22/2026
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