Growing community of inventors

Fukuoka-ken, Japan

Hiroshi Ohnuma

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 = 3

Hiroshi OhnumaKimio Kubo (1 patent)Hiroshi OhnumaHiroyuki Hagiwara (1 patent)Hiroshi OhnumaAkira Mikami (1 patent)Hiroshi OhnumaKatuhiro Kurose (1 patent)Hiroshi OhnumaTaichi Ikejiri (1 patent)Hiroshi OhnumaHiroshi Ohnuma (1 patent)Kimio KuboKimio Kubo (8 patents)Hiroyuki HagiwaraHiroyuki Hagiwara (2 patents)Akira MikamiAkira Mikami (2 patents)Katuhiro KuroseKatuhiro Kurose (1 patent)Taichi IkejiriTaichi Ikejiri (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi Metals, Ltd. (1 from 2,333 patents)


1 patent:

1. 5706880 - Vacuum casting method and vacuum casting apparatus

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as of
12/12/2025
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