Growing community of inventors

Yokohama, Japan

Hiroaki Ichikawa

Average Co-Inventor Count = 5.17

ph-index = 3

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

Hiroaki IchikawaYukio Sakabe (2 patents)Hiroaki IchikawaYoshihide Sugiura (2 patents)Hiroaki IchikawaNobutake Matsumura (2 patents)Hiroaki IchikawaHarufumi Mandai (1 patent)Hiroaki IchikawaHarunobu Sano (1 patent)Hiroaki IchikawaHiroshi Takagi (1 patent)Hiroaki IchikawaNobuo Sasaki (1 patent)Hiroaki IchikawaYasuyuki Naito (1 patent)Hiroaki IchikawaKoji Tanaka (1 patent)Hiroaki IchikawaGoro Nishioka (1 patent)Hiroaki IchikawaTadashi Morimoto (1 patent)Hiroaki IchikawaHirofumi Tsuchimoto (1 patent)Hiroaki IchikawaAkihiko Shibata (1 patent)Hiroaki IchikawaMasayuki Yamada (1 patent)Hiroaki IchikawaKyoshiro Okude (1 patent)Hiroaki IchikawaKiyotaka Asai (1 patent)Hiroaki IchikawaKouki Ejiri (1 patent)Hiroaki IchikawaHidesato Uegaki (1 patent)Hiroaki IchikawaRyusuke Hoshikawa (1 patent)Hiroaki IchikawaSyoji Sato (1 patent)Hiroaki IchikawaHiroaki Ichikawa (5 patents)Yukio SakabeYukio Sakabe (75 patents)Yoshihide SugiuraYoshihide Sugiura (5 patents)Nobutake MatsumuraNobutake Matsumura (3 patents)Harufumi MandaiHarufumi Mandai (81 patents)Harunobu SanoHarunobu Sano (68 patents)Hiroshi TakagiHiroshi Takagi (53 patents)Nobuo SasakiNobuo Sasaki (46 patents)Yasuyuki NaitoYasuyuki Naito (45 patents)Koji TanakaKoji Tanaka (26 patents)Goro NishiokaGoro Nishioka (17 patents)Tadashi MorimotoTadashi Morimoto (15 patents)Hirofumi TsuchimotoHirofumi Tsuchimoto (13 patents)Akihiko ShibataAkihiko Shibata (7 patents)Masayuki YamadaMasayuki Yamada (3 patents)Kyoshiro OkudeKyoshiro Okude (2 patents)Kiyotaka AsaiKiyotaka Asai (1 patent)Kouki EjiriKouki Ejiri (1 patent)Hidesato UegakiHidesato Uegaki (1 patent)Ryusuke HoshikawaRyusuke Hoshikawa (1 patent)Syoji SatoSyoji Sato (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Fujitsu Corporation (2 from 39,250 patents)

2. Murata Manufacturing Co., Ltd. (2 from 13,773 patents)

3. Murata Mfg. Co., Ltd. (1 from 132 patents)


5 patents:

1. 12329490 - Conversion adapter

2. 5073523 - Dielectric ceramic composition

3. 4820670 - Dielectric ceramic composition

4. 4791474 - Semiconductor integrated circuit device

5. 4412237 - Semiconductor device

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as of
1/22/2026
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