Growing community of inventors

Ichihara, Japan

Yoshifumi Oura

Average Co-Inventor Count = 6.00

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

Yoshifumi Oura ↔ Kazuyoshi Yoshida (1 patent)Yoshifumi Oura ↔ Hiroyuki Kudo (1 patent)Yoshifumi Oura ↔ Yoshihiro Sano (1 patent)Yoshifumi Oura ↔ Kunio Matsuzawa (1 patent)Yoshifumi Oura ↔ Keizo Inagaki (1 patent)Yoshifumi OuraYoshifumi Oura (1 patent)Kazuyoshi YoshidaKazuyoshi Yoshida (22 patents)Hiroyuki KudoHiroyuki Kudo (10 patents)Yoshihiro SanoYoshihiro Sano (6 patents)Kunio MatsuzawaKunio Matsuzawa (4 patents)Keizo InagakiKeizo Inagaki (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi, Ltd. (1 from 42,494 patents)

2. The Tokyo Electric Power Company, Incorporated (1 from 177 patents)


1 patent:

1. 4772978 - Transformer protection system

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as of
12/19/2025
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