Growing community of inventors

Tokyo, Japan

Kyohei Sonoyama

Average Co-Inventor Count = 5.00

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 = 3

Kyohei Sonoyama ↔ Masaharu Ueda (1 patent)Kyohei Sonoyama ↔ Teruhisa Miyazaki (1 patent)Kyohei Sonoyama ↔ Takuya Tanahashi (1 patent)Kyohei Sonoyama ↔ Katsuya Iwano (1 patent)Kyohei SonoyamaKyohei Sonoyama (1 patent)Masaharu UedaMasaharu Ueda (30 patents)Teruhisa MiyazakiTeruhisa Miyazaki (11 patents)Takuya TanahashiTakuya Tanahashi (7 patents)Katsuya IwanoKatsuya Iwano (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Nippon Steel Corporation (1 from 3,548 patents)


1 patent:

1. 8361246 - Pearlite rail

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as of
12/15/2025
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