Growing community of inventors

Ohi, Japan

Takashi Yamahata

Average Co-Inventor Count = 4.00

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 = 1

Takashi YamahataTakuji Itoh (1 patent)Takashi YamahataTadashi Miura (1 patent)Takashi YamahataEiichiroh Nishikawa (1 patent)Takashi YamahataTakashi Yamahata (1 patent)Takuji ItohTakuji Itoh (17 patents)Tadashi MiuraTadashi Miura (8 patents)Eiichiroh NishikawaEiichiroh Nishikawa (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Toa Nenryo Kogyo Kabushiki Kaisha (1 from 220 patents)


1 patent:

1. 4049581 - Method for preparing hydrocarbon conversion catalyst using acid amide

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1/8/2026
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