Growing community of inventors

Kangawa, Japan

Sumio Obata

Average Co-Inventor Count = 3.75

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

Sumio ObataMasahiro Shimizu (1 patent)Sumio ObataKohji Takahashi (1 patent)Sumio ObataNobuhiko Wasa (1 patent)Sumio ObataYoshiroh Amano (1 patent)Sumio ObataNaoyuki Yamazaki (1 patent)Sumio ObataShigeru Ohyama (1 patent)Sumio ObataSumio Obata (2 patents)Masahiro ShimizuMasahiro Shimizu (111 patents)Kohji TakahashiKohji Takahashi (17 patents)Nobuhiko WasaNobuhiko Wasa (5 patents)Yoshiroh AmanoYoshiroh Amano (3 patents)Naoyuki YamazakiNaoyuki Yamazaki (1 patent)Shigeru OhyamaShigeru Ohyama (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi Global Storage Technologies Netherlands B.v. (2 from 2,636 patents)


2 patents:

1. 7488183 - Data storage device and connector disposed therein

2. 7457068 - Magnetic disk drive with efficient power generation

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as of
12/5/2025
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