Growing community of inventors

Tachikawa, Japan

Kouichi Hasegawa

Average Co-Inventor Count = 4.44

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 = 76

Kouichi Hasegawa ↔ Tomoyuki Miyata (1 patent)Kouichi Hasegawa ↔ Masao Sunagawa (1 patent)Kouichi Hasegawa ↔ Syuji Watanabe (1 patent)Kouichi Hasegawa ↔ Shigetaka Kimura (1 patent)Kouichi Hasegawa ↔ Tetsuro Aobori (1 patent)Kouichi Hasegawa ↔ Kouichi Sagawa (1 patent)Kouichi Hasegawa ↔ Yoshikuni Ohhira (1 patent)Kouichi HasegawaKouichi Hasegawa (2 patents)Tomoyuki MiyataTomoyuki Miyata (36 patents)Masao SunagawaMasao Sunagawa (15 patents)Syuji WatanabeSyuji Watanabe (11 patents)Shigetaka KimuraShigetaka Kimura (5 patents)Tetsuro AoboriTetsuro Aobori (3 patents)Kouichi SagawaKouichi Sagawa (1 patent)Yoshikuni OhhiraYoshikuni Ohhira (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi, Ltd. (2 from 42,485 patents)


2 patents:

1. D315624 - Electric vacuum cleaner

2. D293728 - Vacuum cleaner

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as of
12/8/2025
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