Growing community of inventors

Fukuoka, Japan

Koichi Hirano

Average Co-Inventor Count = 3.00

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 = 33

Koichi Hirano ↔ Tsuneo Joe Kume (1 patent)Koichi Hirano ↔ Toshihiro Sawa (1 patent)Koichi HiranoKoichi Hirano (1 patent)Tsuneo Joe KumeTsuneo Joe Kume (8 patents)Toshihiro SawaToshihiro Sawa (8 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kabushiki Kaisha Yaskawa Denki (1 from 1,101 patents)


1 patent:

1. 5969966 - Power converting apparatus and method using a multiple three-phase PWM

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as of
12/19/2025
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