Growing community of inventors

Osaka, Japan

Hiroshi Shibutani

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 = 5

Hiroshi Shibutani ↔ Hiroshi Ogawa (1 patent)Hiroshi Shibutani ↔ Minoru Takenaka (1 patent)Hiroshi ShibutaniHiroshi Shibutani (1 patent)Hiroshi OgawaHiroshi Ogawa (6 patents)Minoru TakenakaMinoru Takenaka (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Otsuka Kagaku Kabushiki Kaisha (1 from 138 patents)


1 patent:

1. 6355601 - Friction material

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as of
1/23/2026
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