Growing community of inventors

Kawasaki, Japan

Kei Sugibuchi

Average Co-Inventor Count = 1.29

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

Kei SugibuchiHiroki Fukuoka (1 patent)Kei SugibuchiYuuki Tomoeda (1 patent)Kei SugibuchiKei Sugibuchi (3 patents)Hiroki FukuokaHiroki Fukuoka (29 patents)Yuuki TomoedaYuuki Tomoeda (9 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kabushiki Kaisha Toshiba (3 from 52,789 patents)

2. Toshiba Infrastructure Systems & Solutions Corporation (1 from 279 patents)


3 patents:

1. 11431706 - Communication control system and communication control device

2. 9798739 - IC card and IC card control method

3. 9779347 - Smart card and portable electronic apparatus

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as of
1/20/2026
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