Growing community of inventors

Hiroshima, Japan

Hitoshi Hamanaka

Average Co-Inventor Count = 2.77

ph-index = 3

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 = 22

Hitoshi HamanakaMitsuaki Arata (2 patents)Hitoshi HamanakaKen Yoshioka (1 patent)Hitoshi HamanakaKazuhiko Tokutomi (1 patent)Hitoshi HamanakaMakoto Naito (1 patent)Hitoshi HamanakaMithuaki Arata (1 patent)Hitoshi HamanakaHitoshi Hamanaka (3 patents)Mitsuaki ArataMitsuaki Arata (5 patents)Ken YoshiokaKen Yoshioka (5 patents)Kazuhiko TokutomiKazuhiko Tokutomi (1 patent)Makoto NaitoMakoto Naito (1 patent)Mithuaki ArataMithuaki Arata (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Nishikawa Rubber Co., Ltd. (3 from 233 patents)


3 patents:

1. 7066473 - Glass seal weatherstrip

2. 6837005 - Weatherstrip for automobile

3. 6663165 - Method for attaching door parts and unified parts of automobile door

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as of
1/19/2026
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