Growing community of inventors

Kitakyushu, Japan

Hidefumi Koyakumaru

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 = 1

Hidefumi Koyakumaru ↔ Shoji Shimada (1 patent)Hidefumi Koyakumaru ↔ Kazuhiko Yoshinari (1 patent)Hidefumi KoyakumaruHidefumi Koyakumaru (1 patent)Shoji ShimadaShoji Shimada (3 patents)Kazuhiko YoshinariKazuhiko Yoshinari (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Nippon Steel Corporation (1 from 3,554 patents)


1 patent:

1. 4210469 - Process of annealing for preventing temper colors on a steel sheet

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12/20/2025
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