Growing community of inventors

Gifu, Japan

Yoshikazu Hasagawa

Average Co-Inventor Count = 6.00

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 = 0

Yoshikazu Hasagawa ↔ Yoshimasa Machida (1 patent)Yoshikazu Hasagawa ↔ Shigeto Negi (1 patent)Yoshikazu Hasagawa ↔ Isao Saito (1 patent)Yoshikazu Hasagawa ↔ Hiroshi Yamauchi (1 patent)Yoshikazu Hasagawa ↔ Tamio Kawamura (1 patent)Yoshikazu HasagawaYoshikazu Hasagawa (1 patent)Yoshimasa MachidaYoshimasa Machida (42 patents)Shigeto NegiShigeto Negi (38 patents)Isao SaitoIsao Saito (36 patents)Hiroshi YamauchiHiroshi Yamauchi (17 patents)Tamio KawamuraTamio Kawamura (4 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Eisai Company, Limited (1 from 677 patents)


1 patent:

1. 4448775 - 3-Carbamoyloxymethylcephem derivatives, and antibacterial drugs

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as of
1/9/2026
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