Growing community of inventors

Oumi, Japan

Hirosi Yamagisi

Average Co-Inventor Count = 4.00

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 = 60

Hirosi Yamagisi ↔ Koji Nakagawa (1 patent)Hirosi Yamagisi ↔ Minoru Sirasawa (1 patent)Hirosi Yamagisi ↔ Shozo Sakamaki (1 patent)Hirosi YamagisiHirosi Yamagisi (1 patent)Koji NakagawaKoji Nakagawa (7 patents)Minoru SirasawaMinoru Sirasawa (1 patent)Shozo SakamakiShozo Sakamaki (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Denki Kagaku Kogyo Kabushiki Kaisha (1 from 475 patents)


1 patent:

1. 4190454 - Cement retarder and rapid hardening cement containing the same

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12/19/2025
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