Growing community of inventors

Tokyo, Japan

Katsuji Doi

Average Co-Inventor Count = 1.71

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 = 134

Katsuji DoiIkuo Saga (1 patent)Katsuji DoiKatsuro Hayami (1 patent)Katsuji DoiShigeki Nakane (1 patent)Katsuji DoiToshiyuki Matsuo (1 patent)Katsuji DoiToshio Sogawa (1 patent)Katsuji DoiKatsuji Doi (2 patents)Ikuo SagaIkuo Saga (8 patents)Katsuro HayamiKatsuro Hayami (8 patents)Shigeki NakaneShigeki Nakane (4 patents)Toshiyuki MatsuoToshiyuki Matsuo (3 patents)Toshio SogawaToshio Sogawa (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Mitsubishi Denki Kabushiki Kaisha (1 from 21,351 patents)

2. Mitsubishi Denki K.k. (1 from 488 patents)


2 patents:

1. 6377890 - Navigator

2. 5831552 - Traffic information display unit

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as of
1/1/2026
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