Growing community of inventors

Yamaguchi, Japan

Nobuyuki Fugiyama

Average Co-Inventor Count = 4.00

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 = 50

Nobuyuki Fugiyama ↔ Toshiharu Matsuda (2 patents)Nobuyuki Fugiyama ↔ Yoshinao Okumoto (2 patents)Nobuyuki Fugiyama ↔ Yoshichika Fukushima (2 patents)Nobuyuki FugiyamaNobuyuki Fugiyama (2 patents)Toshiharu MatsudaToshiharu Matsuda (9 patents)Yoshinao OkumotoYoshinao Okumoto (5 patents)Yoshichika FukushimaYoshichika Fukushima (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi, Ltd. (2 from 42,488 patents)


2 patents:

1. 4982583 - Air conditioner for railway vehicles

2. 4905478 - Air conditioner for railway vehicles

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as of
12/10/2025
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