Growing community of inventors

Tokyo to Shinjuke ku, Japan

Yohei Nakagawa

Average Co-Inventor Count = 3.00

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 = 0

Yohei NakagawaKatsumi Kishino (1 patent)Yohei NakagawaShunsuke Ishizawa (1 patent)Yohei NakagawaYohei Nakagawa (1 patent)Katsumi KishinoKatsumi Kishino (32 patents)Shunsuke IshizawaShunsuke Ishizawa (9 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Seiko Epson Corporation (1 from 33,404 patents)

2. Sophia School Corporation (1 from 40 patents)


1 patent:

1. 12308617 - Light emitting device and projector

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as of
12/8/2025
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