Growing community of inventors

Yokohama, Japan

Junichi Koyama

Average Co-Inventor Count = 13.26

ph-index = 4

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 = 149

Junichi KoyamaHiroshi Fukui (4 patents)Junichi KoyamaYutaka Ohtsu (4 patents)Junichi KoyamaTaketoshi Kanda (4 patents)Junichi KoyamaMotokiyo Nakano (4 patents)Junichi KoyamaOkitsugu Nakata (4 patents)Junichi KoyamaTakashi Ogawa (3 patents)Junichi KoyamaAsa Kimura (3 patents)Junichi KoyamaKazuhisa Ohno (3 patents)Junichi KoyamaTsutomu Saito (3 patents)Junichi KoyamaToshio Yoneyama (3 patents)Junichi KoyamaKazuo Tokubo (3 patents)Junichi KoyamaHideo Morohoshi (3 patents)Junichi KoyamaRyujiro Namba (3 patents)Junichi KoyamaKunihiro Kawaguchi (3 patents)Junichi KoyamaYuzo Shimizu (3 patents)Junichi KoyamaKenichi Tomita (2 patents)Junichi KoyamaOsamu Shirota (1 patent)Junichi KoyamaIsao Tanaka (1 patent)Junichi KoyamaKenichi Tommita (1 patent)Junichi KoyamaJunichi Koyama (4 patents)Hiroshi FukuiHiroshi Fukui (92 patents)Yutaka OhtsuYutaka Ohtsu (16 patents)Taketoshi KandaTaketoshi Kanda (13 patents)Motokiyo NakanoMotokiyo Nakano (8 patents)Okitsugu NakataOkitsugu Nakata (4 patents)Takashi OgawaTakashi Ogawa (53 patents)Asa KimuraAsa Kimura (20 patents)Kazuhisa OhnoKazuhisa Ohno (17 patents)Tsutomu SaitoTsutomu Saito (9 patents)Toshio YoneyamaToshio Yoneyama (6 patents)Kazuo TokuboKazuo Tokubo (5 patents)Hideo MorohoshiHideo Morohoshi (5 patents)Ryujiro NambaRyujiro Namba (4 patents)Kunihiro KawaguchiKunihiro Kawaguchi (3 patents)Yuzo ShimizuYuzo Shimizu (3 patents)Kenichi TomitaKenichi Tomita (20 patents)Osamu ShirotaOsamu Shirota (12 patents)Isao TanakaIsao Tanaka (4 patents)Kenichi TommitaKenichi Tommita (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Shiseido Company, Limited (4 from 1,008 patents)


4 patents:

1. 4882225 - Modified powder or particulate material

2. 4818614 - Modified powder

3. 4801445 - Cosmetic compositions containing modified powder or particulate material

4. 4743377 - Packing material for liquid chromatography

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as of
12/10/2025
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