Growing community of inventors

Tokyo, Japan

Takahiko Koga

Average Co-Inventor Count = 7.00

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 = 10

Takahiko KogaItsuo Tanuma (1 patent)Takahiko KogaKazuo Naito (1 patent)Takahiko KogaYasuhiro Morimura (1 patent)Takahiko KogaHideyuki Niwa (1 patent)Takahiko KogaKiyomi Sasaki (1 patent)Takahiko KogaKyoei Yoshida (1 patent)Takahiko KogaTakahiko Koga (1 patent)Itsuo TanumaItsuo Tanuma (49 patents)Kazuo NaitoKazuo Naito (39 patents)Yasuhiro MorimuraYasuhiro Morimura (35 patents)Hideyuki NiwaHideyuki Niwa (8 patents)Kiyomi SasakiKiyomi Sasaki (5 patents)Kyoei YoshidaKyoei Yoshida (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Bridgestone Corporation (1 from 5,125 patents)


1 patent:

1. 5547762 - Sandwich glasses

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as of
1/10/2026
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