Growing community of inventors

Tokyo, Japan

Hiroko Usami

Average Co-Inventor Count = 3.33

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 = 20

Hiroko Usami ↔ Akihiro Yamamoto (2 patents)Hiroko Usami ↔ Yutaka Sugawara (2 patents)Hiroko Usami ↔ Yoshiko Kato (1 patent)Hiroko Usami ↔ Haruki Ogawa (1 patent)Hiroko Usami ↔ Mitsuaki Handa (1 patent)Hiroko Usami ↔ Shozo Kotani (1 patent)Hiroko Usami ↔ Keijiro Kato (1 patent)Hiroko UsamiHiroko Usami (3 patents)Akihiro YamamotoAkihiro Yamamoto (51 patents)Yutaka SugawaraYutaka Sugawara (3 patents)Yoshiko KatoYoshiko Kato (10 patents)Haruki OgawaHaruki Ogawa (9 patents)Mitsuaki HandaMitsuaki Handa (2 patents)Shozo KotaniShozo Kotani (1 patent)Keijiro KatoKeijiro Kato (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Chugai Seiyaku Kabushiki Kaisha (3 from 949 patents)

2. Sawai Pharmaceutical Co., Ltd. (1 from 28 patents)


3 patents:

1. 4900724 - Tumor necrosis factor inducing substance derived from acid-fast bacteria

2. 4678773 - Antitumor agent

3. 4242326 - Anti-tumor substance and process for preparing the same

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as of
12/26/2025
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