Growing community of inventors

Tokyo, Japan

Harunobu Hirayama

Average Co-Inventor Count = 5.60

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 = 142

Harunobu Hirayama ↔ Youichi Suzuki (3 patents)Harunobu Hirayama ↔ Masahito Hanaoka (3 patents)Harunobu Hirayama ↔ Fumihiko Yoshiro (3 patents)Harunobu Hirayama ↔ Yasuki Tsutsumi (2 patents)Harunobu Hirayama ↔ Keiji Abe (2 patents)Harunobu Hirayama ↔ Sachiko Aoki (2 patents)Harunobu HirayamaHarunobu Hirayama (3 patents)Youichi SuzukiYouichi Suzuki (14 patents)Masahito HanaokaMasahito Hanaoka (4 patents)Fumihiko YoshiroFumihiko Yoshiro (4 patents)Yasuki TsutsumiYasuki Tsutsumi (8 patents)Keiji AbeKeiji Abe (6 patents)Sachiko AokiSachiko Aoki (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kao Corporation (2 from 3,600 patents)

2. Kao Kabushiki Kaisha (kao Corporation) (1 from 2 patents)


3 patents:

1. 6047435 - Cleaning cloth and cleaning apparatus

2. 5953784 - Cleaning cloth and cleaning apparatus

3. D391711 - Handy mop

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as of
12/7/2025
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