Growing community of inventors

Otokuni-gun, Japan

Hiroshi Okubo

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 = 4

Hiroshi Okubo ↔ Masashi Takahashi (1 patent)Hiroshi Okubo ↔ Masayoshi Onishi (1 patent)Hiroshi Okubo ↔ Yoshie Arai (1 patent)Hiroshi Okubo ↔ Yoshinari Yasuda (1 patent)Hiroshi OkuboHiroshi Okubo (1 patent)Masashi TakahashiMasashi Takahashi (38 patents)Masayoshi OnishiMasayoshi Onishi (4 patents)Yoshie AraiYoshie Arai (2 patents)Yoshinari YasudaYoshinari Yasuda (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Toppan Printing Co., Ltd. (1 from 1,268 patents)

2. Maxell Seiki, Ltd. (1 from 4 patents)


1 patent:

1. 7189766 - Ink for printing, printed matter, printing method and printer

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as of
1/6/2026
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