Growing community of inventors

Yokohama, Japan

Hiroshi Oka

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 = 1

Hiroshi OkaHisashi Nagamoto (1 patent)Hiroshi OkaMasayuki Kohashi (1 patent)Hiroshi OkaHiroshi Oka (1 patent)Hisashi NagamotoHisashi Nagamoto (5 patents)Masayuki KohashiMasayuki Kohashi (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Otsuka Pharmaceutical Company, Limited (1 from 846 patents)

2. St. Marianna University School of Medicine (1 from 14 patents)


1 patent:

1. 7879877 - Carbostyril derivatives for accelerating salivation

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1/5/2026
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