Growing community of inventors

Tokyo, Japan

Sumiko Yamamoto

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 = 35

Sumiko Yamamoto ↔ Yoshiharu Kitamura (1 patent)Sumiko Yamamoto ↔ Takeo Hayashi (1 patent)Sumiko Yamamoto ↔ Hideo Kawai (1 patent)Sumiko Yamamoto ↔ Shigeru Kubo (1 patent)Sumiko Yamamoto ↔ Masahiko Ebina (1 patent)Sumiko Yamamoto ↔ Yoshiyuki Akita (1 patent)Sumiko YamamotoSumiko Yamamoto (1 patent)Yoshiharu KitamuraYoshiharu Kitamura (31 patents)Takeo HayashiTakeo Hayashi (10 patents)Hideo KawaiHideo Kawai (1 patent)Shigeru KuboShigeru Kubo (1 patent)Masahiko EbinaMasahiko Ebina (1 patent)Yoshiyuki AkitaYoshiyuki Akita (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Nhk Spring Co., Ltd. (1 from 1,233 patents)


1 patent:

1. 6171272 - Short leg brace

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as of
12/20/2025
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