Growing community of inventors

Tokyo, Japan

Yukio Hirakawa

Average Co-Inventor Count = 3.00

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 = 15

Yukio HirakawaShozo Noguchi (1 patent)Yukio HirakawaKatsunori Miyagaki (1 patent)Yukio HirakawaYukio Hirakawa (1 patent)Shozo NoguchiShozo Noguchi (3 patents)Katsunori MiyagakiKatsunori Miyagaki (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Nippon Electric Co., Ltd. (1 from 1,038 patents)


1 patent:

1. 4266239 - Semiconductor device having improved high frequency characteristics

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12/12/2025
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