Growing community of inventors

Tokyo, Japan

Ryo Shiina

Average Co-Inventor Count = 2.25

ph-index = 2

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 = 19

Ryo Shiina ↔ Makoto Sato (2 patents)Ryo Shiina ↔ Hiroshi Ishikawa (1 patent)Ryo Shiina ↔ Makoto Sato (1 patent)Ryo ShiinaRyo Shiina (3 patents)Makoto SatoMakoto Sato (233 patents)Hiroshi IshikawaHiroshi Ishikawa (77 patents)Makoto SatoMakoto Sato (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Tohatsu Corporation (3 from 11 patents)


3 patents:

1. D1039220 - Fire extinguishing pump

2. D955440 - Outboard motor

3. D921042 - Outboard motor

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as of
12/16/2025
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