Growing community of inventors

Kudamatsu, Japan

Yasuhiro Koyakumaru

Average Co-Inventor Count = 3.00

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 = 14

Yasuhiro KoyakumaruHitoshi Ohmura (2 patents)Yasuhiro KoyakumaruSatoshi Iketaka (2 patents)Yasuhiro KoyakumaruYasuhiro Koyakumaru (2 patents)Hitoshi OhmuraHitoshi Ohmura (19 patents)Satoshi IketakaSatoshi Iketaka (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Toyo Kohan Co., Ltd. (2 from 260 patents)


2 patents:

1. 5679181 - Method for manufacturing a corrosion resistant nickel plating steel

2. 5587248 - Corrosion resistant nickel plating steel sheet or strip and

Please report any incorrect information to support@idiyas.com
idiyas.com
as of
1/8/2026
Loading…