Growing community of inventors

Hiroshima, Japan

Ryuji Kumagai

Average Co-Inventor Count = 4.31

ph-index = 10

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 = 280

Ryuji KumagaiYasutake Tsuchida (5 patents)Ryuji KumagaiTakanori Tsubaki (4 patents)Ryuji KumagaiTakeshi Shinohara (4 patents)Ryuji KumagaiRyousuke Nozaki (4 patents)Ryuji KumagaiDai Kimura (3 patents)Ryuji KumagaiYouichi Sato (3 patents)Ryuji KumagaiKeisuke Nakai (3 patents)Ryuji KumagaiYutaka Sukegawa (3 patents)Ryuji KumagaiMasatoshi Miyake (3 patents)Ryuji KumagaiKunihiko Kurisu (2 patents)Ryuji KumagaiYoshito Iwauchi (2 patents)Ryuji KumagaiMasanori Minamisawa (2 patents)Ryuji KumagaiKazuhisa Noda (2 patents)Ryuji KumagaiKousuke Takahashi (2 patents)Ryuji KumagaiTakuya Obatake (2 patents)Ryuji KumagaiTomoyuki Suzuki (2 patents)Ryuji KumagaiKoji Miyamoto (1 patent)Ryuji KumagaiKouji Tabata (1 patent)Ryuji KumagaiHeitetsu Takemoto (1 patent)Ryuji KumagaiKaname Sawai (1 patent)Ryuji KumagaiShun Yamashita (1 patent)Ryuji KumagaiHiroto Arai (1 patent)Ryuji KumagaiShinichi Isayama (1 patent)Ryuji KumagaiAkira Tamatani (1 patent)Ryuji KumagaiTetsuji Kawakami (1 patent)Ryuji KumagaiMasashi Aikawa (1 patent)Ryuji KumagaiIkuo Maeda (1 patent)Ryuji KumagaiYasuo Suzuki (1 patent)Ryuji KumagaiTomoyuki Mori (1 patent)Ryuji KumagaiSiyoung Song (1 patent)Ryuji KumagaiYukiharu Asano (1 patent)Ryuji KumagaiKosuke Takahashi (1 patent)Ryuji KumagaiAtsunori Mori (1 patent)Ryuji KumagaiTadashi Ozeki (1 patent)Ryuji KumagaiCho Yong Wook (1 patent)Ryuji KumagaiYuuji Ishimoto (1 patent)Ryuji KumagaiShinichi Imai (1 patent)Ryuji KumagaiYuki Suga (1 patent)Ryuji KumagaiEiji Kimoto (1 patent)Ryuji KumagaiKota Akagawa (1 patent)Ryuji KumagaiRyuji Kumagai (18 patents)Yasutake TsuchidaYasutake Tsuchida (17 patents)Takanori TsubakiTakanori Tsubaki (16 patents)Takeshi ShinoharaTakeshi Shinohara (15 patents)Ryousuke NozakiRyousuke Nozaki (13 patents)Dai KimuraDai Kimura (16 patents)Youichi SatoYouichi Sato (15 patents)Keisuke NakaiKeisuke Nakai (12 patents)Yutaka SukegawaYutaka Sukegawa (8 patents)Masatoshi MiyakeMasatoshi Miyake (5 patents)Kunihiko KurisuKunihiko Kurisu (20 patents)Yoshito IwauchiYoshito Iwauchi (17 patents)Masanori MinamisawaMasanori Minamisawa (15 patents)Kazuhisa NodaKazuhisa Noda (13 patents)Kousuke TakahashiKousuke Takahashi (13 patents)Takuya ObatakeTakuya Obatake (8 patents)Tomoyuki SuzukiTomoyuki Suzuki (6 patents)Koji MiyamotoKoji Miyamoto (19 patents)Kouji TabataKouji Tabata (15 patents)Heitetsu TakemotoHeitetsu Takemoto (10 patents)Kaname SawaiKaname Sawai (10 patents)Shun YamashitaShun Yamashita (9 patents)Hiroto AraiHiroto Arai (8 patents)Shinichi IsayamaShinichi Isayama (8 patents)Akira TamataniAkira Tamatani (7 patents)Tetsuji KawakamiTetsuji Kawakami (7 patents)Masashi AikawaMasashi Aikawa (6 patents)Ikuo MaedaIkuo Maeda (5 patents)Yasuo SuzukiYasuo Suzuki (5 patents)Tomoyuki MoriTomoyuki Mori (5 patents)Siyoung SongSiyoung Song (5 patents)Yukiharu AsanoYukiharu Asano (4 patents)Kosuke TakahashiKosuke Takahashi (4 patents)Atsunori MoriAtsunori Mori (4 patents)Tadashi OzekiTadashi Ozeki (4 patents)Cho Yong WookCho Yong Wook (3 patents)Yuuji IshimotoYuuji Ishimoto (3 patents)Shinichi ImaiShinichi Imai (2 patents)Yuki SugaYuki Suga (2 patents)Eiji KimotoEiji Kimoto (2 patents)Kota AkagawaKota Akagawa (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Mazda Motor Corporation (18 from 4,676 patents)


18 patents:

1. D922285 - Motor vehicle

2. D883881 - Motor vehicle

3. D883883 - Motor vehicle

4. D845835 - Motor vehicle

5. D842760 - Motor vehicle

6. D819493 - Motor vehicle

7. D765546 - Motor vehicle

8. D756276 - Motor vehicle front bumper

9. D713304 - Bumper for motor vehicle

10. D701476 - Bumper for motor vehicle

11. D698290 - Bumper for motor vehicle

12. D688989 - Bumper for motor vehicle

13. D668593 - Bumper for motor vehicle

14. D595192 - Bumper of motor vehicle

15. D588506 - Bumper of motor vehicle

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12/4/2025
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