Growing community of inventors

Sendai, Japan

Sinpei Maruyama

Average Co-Inventor Count = 8.00

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 = 12

Sinpei Maruyama ↔ Jun-ichi Nishizawa (1 patent)Sinpei Maruyama ↔ Takashige Tamamushi (1 patent)Sinpei Maruyama ↔ Koichi Mitamura (1 patent)Sinpei Maruyama ↔ Kiyoo Mitsui (1 patent)Sinpei Maruyama ↔ Mitsuo Ikehara (1 patent)Sinpei Maruyama ↔ Toyota Wako (1 patent)Sinpei Maruyama ↔ Hiroo Takahashi (1 patent)Sinpei MaruyamaSinpei Maruyama (1 patent)Jun-ichi NishizawaJun-ichi Nishizawa (121 patents)Takashige TamamushiTakashige Tamamushi (30 patents)Koichi MitamuraKoichi Mitamura (3 patents)Kiyoo MitsuiKiyoo Mitsui (2 patents)Mitsuo IkeharaMitsuo Ikehara (1 patent)Toyota WakoToyota Wako (1 patent)Hiroo TakahashiHiroo Takahashi (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Zaidan Hojin Handotai Kenkyu Shinkokai (1 from 81 patents)

2. Tohoku Electric Power Company, Inc. (1 from 66 patents)

3. Tsuken Electric Ind. Co., Ltd. (1 from 1 patent)


1 patent:

1. 5021936 - PWM power converter using mixed bipolar and static induction transistors

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as of
1/13/2026
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