Growing community of inventors

Yasu-gun, Japan

Sumio Hirotsu

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 = 2

Sumio Hirotsu ↔ Nobuya Sato (1 patent)Sumio Hirotsu ↔ Mikio Suzuki (1 patent)Sumio Hirotsu ↔ Haruo Sakahashi (1 patent)Sumio Hirotsu ↔ Yoshihito Nagura (1 patent)Sumio Hirotsu ↔ Kaoru Shibata (1 patent)Sumio HirotsuSumio Hirotsu (1 patent)Nobuya SatoNobuya Sato (8 patents)Mikio SuzukiMikio Suzuki (7 patents)Haruo SakahashiHaruo Sakahashi (2 patents)Yoshihito NaguraYoshihito Nagura (1 patent)Kaoru ShibataKaoru Shibata (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kao Corporation (1 from 3,604 patents)

2. Oji Paper Co., Ltd. (1 from 229 patents)


1 patent:

1. 6858288 - Wrap film

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as of
1/7/2026
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