Growing community of inventors

Onojo, Japan

Hajime Sakai

Average Co-Inventor Count = 1.80

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 = 37

Hajime SakaiYuji Hirai (2 patents)Hajime SakaiHideyuki Matsuo (1 patent)Hajime SakaiToshiaki Sakiyama (1 patent)Hajime SakaiKentaro Oka (1 patent)Hajime SakaiYouji Manabe (1 patent)Hajime SakaiHajime Sakai (3 patents)Yuji HiraiYuji Hirai (11 patents)Hideyuki MatsuoHideyuki Matsuo (6 patents)Toshiaki SakiyamaToshiaki Sakiyama (2 patents)Kentaro OkaKentaro Oka (1 patent)Youji ManabeYouji Manabe (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Matsushita Electric Industrial Co., Ltd. (3 from 27,375 patents)


3 patents:

1. 7130647 - Cordless telephone system

2. 6882713 - Telephone apparatus

3. 5487105 - Facsimile apparatus operable in facsimile or telephone mode

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idiyas.com
as of
12/14/2025
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