Growing community of inventors

Ibaraki, Japan

Masahiko Tatsuma

Average Co-Inventor Count = 2.00

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 = 3

Masahiko TatsumaJunichi Sekihachi (1 patent)Masahiko TatsumaMasahiko Tatsuma (1 patent)Junichi SekihachiJunichi Sekihachi (7 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Sumitomo Chemical Company, Limited (1 from 6,893 patents)


1 patent:

1. 6146430 - Asymmetric dioxazine compound and method for dyeing or printing fiber

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as of
12/16/2025
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