Growing community of inventors

Tokyo, Japan

Keizaburo Watanabe

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 = 16

Keizaburo Watanabe ↔ Tsunekazu Watanabe (1 patent)Keizaburo Watanabe ↔ Noboru Nonoyama (1 patent)Keizaburo Watanabe ↔ Masayoshi Kitazume (1 patent)Keizaburo Watanabe ↔ Yukihiro Tomita (1 patent)Keizaburo Watanabe ↔ Yoshio Ohshima (1 patent)Keizaburo WatanabeKeizaburo Watanabe (1 patent)Tsunekazu WatanabeTsunekazu Watanabe (4 patents)Noboru NonoyamaNoboru Nonoyama (2 patents)Masayoshi KitazumeMasayoshi Kitazume (1 patent)Yukihiro TomitaYukihiro Tomita (1 patent)Yoshio OhshimaYoshio Ohshima (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kabushiki Kaisha Yakult Honsha (1 from 210 patents)

2. Fujita Corporation (1 from 14 patents)

3. Public Works Research Institute, Ministry of Construction (1 from 5 patents)


1 patent:

1. 4985149 - Anaerobic digestion method

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1/4/2026
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