Growing community of inventors

Higashimurayama, Japan

Keiji Hasegawa

Average Co-Inventor Count = 5.00

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 = 113

Keiji Hasegawa ↔ Takashi Yano (3 patents)Keiji Hasegawa ↔ Nobukazu Doi (3 patents)Keiji Hasegawa ↔ Katsuhiko Tsunehara (3 patents)Keiji Hasegawa ↔ Takaki Uta (3 patents)Keiji HasegawaKeiji Hasegawa (3 patents)Takashi YanoTakashi Yano (103 patents)Nobukazu DoiNobukazu Doi (91 patents)Katsuhiko TsuneharaKatsuhiko Tsunehara (38 patents)Takaki UtaTakaki Uta (17 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi, Ltd. (3 from 42,485 patents)


3 patents:

1. 7006463 - CDMA communication system and its transmission power control method

2. 6483816 - CDMA communication system and its transmission power control method

3. 6307844 - CDMA communication system and its transmission power control method

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as of
12/6/2025
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