Growing community of inventors

Nagareyama, Japan

Takeyasu Otsuka

Average Co-Inventor Count = 5.00

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

Takeyasu OtsukaSadao Yoshikawa (2 patents)Takeyasu OtsukaTakeaki Eto (2 patents)Takeyasu OtsukaKiyonori Suzuki (2 patents)Takeyasu OtsukaShozo Abe (2 patents)Takeyasu OtsukaTakeyasu Otsuka (2 patents)Sadao YoshikawaSadao Yoshikawa (3 patents)Takeaki EtoTakeaki Eto (2 patents)Kiyonori SuzukiKiyonori Suzuki (2 patents)Shozo AbeShozo Abe (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Soda Koryo Kabushiki Kaisha (2 from 2 patents)


2 patents:

1. 4246182 - Process for the preparation of omega-hydroxy fatty acids from

2. 4244873 - Omega-hydroxy or acyloxy-alkyl-.gamma.-butyrolactones

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as of
12/13/2025
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