Growing community of inventors

Tokyo, Japan

Hiroaki Nakagawa

Average Co-Inventor Count = 4.17

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 = 44

Hiroaki NakagawaShigeyuki Akihama (5 patents)Hiroaki NakagawaMikio Kobayashi (5 patents)Hiroaki NakagawaTatsuo Suenaga (5 patents)Hiroaki NakagawaHideki Ikeda (4 patents)Hiroaki NakagawaTakeo Kikuchi (4 patents)Hiroaki NakagawaToshio Furuya (4 patents)Hiroaki NakagawaShunichi Sugishita (4 patents)Hiroaki NakagawaShin Terauchi (4 patents)Hiroaki NakagawaShinnosuke Aiba (4 patents)Hiroaki NakagawaKatsumi Kosuge (4 patents)Hiroaki NakagawaMasato Tanaami (4 patents)Hiroaki NakagawaKenji Ago (4 patents)Hiroaki NakagawaYasuyuki Matsubara (4 patents)Hiroaki NakagawaTakahiro Arai (4 patents)Hiroaki NakagawaYutaka Katsuta (4 patents)Hiroaki NakagawaKengo Muramatsu (3 patents)Hiroaki NakagawaToshiyuki Fukumoto (1 patent)Hiroaki NakagawaYoshikazu Taniguchi (1 patent)Hiroaki NakagawaHiroaki Nakagawa (8 patents)Shigeyuki AkihamaShigeyuki Akihama (10 patents)Mikio KobayashiMikio Kobayashi (7 patents)Tatsuo SuenagaTatsuo Suenaga (7 patents)Hideki IkedaHideki Ikeda (10 patents)Takeo KikuchiTakeo Kikuchi (5 patents)Toshio FuruyaToshio Furuya (5 patents)Shunichi SugishitaShunichi Sugishita (4 patents)Shin TerauchiShin Terauchi (4 patents)Shinnosuke AibaShinnosuke Aiba (4 patents)Katsumi KosugeKatsumi Kosuge (4 patents)Masato TanaamiMasato Tanaami (4 patents)Kenji AgoKenji Ago (4 patents)Yasuyuki MatsubaraYasuyuki Matsubara (4 patents)Takahiro AraiTakahiro Arai (4 patents)Yutaka KatsutaYutaka Katsuta (4 patents)Kengo MuramatsuKengo Muramatsu (3 patents)Toshiyuki FukumotoToshiyuki Fukumoto (3 patents)Yoshikazu TaniguchiYoshikazu Taniguchi (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kajima Corporation (5 from 150 patents)

2. Kabushiki Kaisha F R C (4 from 4 patents)

3. Hitachi-high-technologies Corporation (3 from 2,874 patents)


8 patents:

1. D828576 - Column

2. D827151 - Column end cap

3. D827150 - Column pipe

4. 5798011 - Method of making window frame for concrete wall panel

5. 5591286 - Method of making window frame for concrete wall panel

6. 5575870 - Method of making window frame for concrete wall panel

7. 5356687 - Window frame for concrete wall panel

8. 5010705 - Curtain wall

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as of
12/4/2025
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