Growing community of inventors

Joyo, Japan

Tadashi Okamoto

Average Co-Inventor Count = 7.00

ph-index = 2

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 = 29

Tadashi Okamoto ↔ Nobuyuki Hayashi (2 patents)Tadashi Okamoto ↔ Yoshii Morishita (2 patents)Tadashi Okamoto ↔ Masaharu Nakayama (2 patents)Tadashi Okamoto ↔ Mitsuo Katayose (2 patents)Tadashi Okamoto ↔ Hideo Sawada (2 patents)Tadashi Okamoto ↔ Motohiro Mitani (2 patents)Tadashi OkamotoTadashi Okamoto (2 patents)Nobuyuki HayashiNobuyuki Hayashi (42 patents)Yoshii MorishitaYoshii Morishita (36 patents)Masaharu NakayamaMasaharu Nakayama (26 patents)Mitsuo KatayoseMitsuo Katayose (24 patents)Hideo SawadaHideo Sawada (12 patents)Motohiro MitaniMotohiro Mitani (7 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi Chemical Company, Ltd. (2 from 1,641 patents)

2. Nippon Oil Fats Co., Ltd. (2 from 297 patents)


2 patents:

1. 5378589 - Derivative of naphthalocyanine containing perfluoroalkyl group, process

2. 5260435 - Derivative of naphthalocyanine containing perfluoroalkyl group, process

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as of
12/6/2025
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