Growing community of inventors

Yokohama, Japan

Rumiko Kaku

Average Co-Inventor Count = 5.06

ph-index = 2

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

Rumiko KakuMasaru Suetsugu (2 patents)Rumiko KakuSatoshi Shinojima (2 patents)Rumiko KakuYuki Shibata (2 patents)Rumiko KakuOkihiko Sakamoto (1 patent)Rumiko KakuMinoru Fukuda (1 patent)Rumiko KakuYoshihiro Yokokawa (1 patent)Rumiko KakuKazuhisa Maeda (1 patent)Rumiko KakuYoshihiro Morikawa (1 patent)Rumiko KakuTsuneo Suehiro (1 patent)Rumiko KakuMasayuki Asaike (1 patent)Rumiko KakuRumiko Kaku (3 patents)Masaru SuetsuguMasaru Suetsugu (19 patents)Satoshi ShinojimaSatoshi Shinojima (3 patents)Yuki ShibataYuki Shibata (3 patents)Okihiko SakamotoOkihiko Sakamoto (8 patents)Minoru FukudaMinoru Fukuda (8 patents)Yoshihiro YokokawaYoshihiro Yokokawa (5 patents)Kazuhisa MaedaKazuhisa Maeda (2 patents)Yoshihiro MorikawaYoshihiro Morikawa (2 patents)Tsuneo SuehiroTsuneo Suehiro (1 patent)Masayuki AsaikeMasayuki Asaike (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Shiseido Company, Limited (3 from 1,008 patents)


3 patents:

1. 5767158 - Endermic liniment

2. 5728683 - External escinol preparation for skin

3. 5700784 - External preparation for skin

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as of
1/3/2026
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