Growing community of inventors

Tokyo, Japan

Ryoichi Hamanaka

Average Co-Inventor Count = 2.40

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

Ryoichi HamanakaKaori Sato (2 patents)Ryoichi HamanakaShinichi Ishikawa (1 patent)Ryoichi HamanakaRyoichi Hamanaka (2 patents)Kaori SatoKaori Sato (10 patents)Shinichi IshikawaShinichi Ishikawa (6 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Rion Company Ltd. (2 from 85 patents)


2 patents:

1. 10888253 - Audiometer

2. 10390126 - Earphone for audiometer, and audiometer

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as of
1/8/2026
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