Growing community of inventors

Yokohama, Japan

Keiichi Ishikawa

Average Co-Inventor Count = 3.93

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 = 80

Keiichi IshikawaMasaaki Shin (5 patents)Keiichi IshikawaAkira Misawa (5 patents)Keiichi IshikawaKazuo Hisamatsu (4 patents)Keiichi IshikawaKenichi Miyamoto (3 patents)Keiichi IshikawaMasahide Yamada (3 patents)Keiichi IshikawaAkinori Terada (3 patents)Keiichi IshikawaKazuo Hagiwara (3 patents)Keiichi IshikawaYuuki Endou (3 patents)Keiichi IshikawaHirotami Yamamoto (2 patents)Keiichi IshikawaTomoki Ichinose (2 patents)Keiichi IshikawaKenji Uchiyama (1 patent)Keiichi IshikawaNobuhiro Hirayama (1 patent)Keiichi IshikawaShoji Kawasaki (1 patent)Keiichi IshikawaYuki Endo (1 patent)Keiichi IshikawaAkio Fujiwara (1 patent)Keiichi IshikawaHisatomo Sato (1 patent)Keiichi IshikawaManabu Takezawa (1 patent)Keiichi IshikawaTomohito Chokan (1 patent)Keiichi IshikawaRyosuke Koizumi (1 patent)Keiichi IshikawaKeiichi Ishikawa (13 patents)Masaaki ShinMasaaki Shin (17 patents)Akira MisawaAkira Misawa (10 patents)Kazuo HisamatsuKazuo Hisamatsu (8 patents)Kenichi MiyamotoKenichi Miyamoto (34 patents)Masahide YamadaMasahide Yamada (8 patents)Akinori TeradaAkinori Terada (6 patents)Kazuo HagiwaraKazuo Hagiwara (6 patents)Yuuki EndouYuuki Endou (5 patents)Hirotami YamamotoHirotami Yamamoto (5 patents)Tomoki IchinoseTomoki Ichinose (2 patents)Kenji UchiyamaKenji Uchiyama (15 patents)Nobuhiro HirayamaNobuhiro Hirayama (13 patents)Shoji KawasakiShoji Kawasaki (9 patents)Yuki EndoYuki Endo (7 patents)Akio FujiwaraAkio Fujiwara (6 patents)Hisatomo SatoHisatomo Sato (6 patents)Manabu TakezawaManabu Takezawa (6 patents)Tomohito ChokanTomohito Chokan (4 patents)Ryosuke KoizumiRyosuke Koizumi (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Mitsui Toatsu Chemicals, Incorporated (5 from 1,379 patents)

2. Samsung Electronics Co., Ltd. (4 from 131,214 patents)

3. Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd (4 from 17 patents)


13 patents:

1. 10723953 - Carbide producing method and carbide producing device

2. 10626331 - Biomass fuel production plant

3. 10465119 - Externally heated carbonization furnace

4. 10274854 - Toner for developing electrostatic charge image and method for preparing the same

5. 10261430 - Photoreceptor for electrophotography and image forming apparatus employing the same

6. 10234780 - Toner for developing electrostatic charge image and method for preparing the same

7. 10184082 - Biomass pyrolysis apparatus, and power generation system

8. 9740125 - Toner for developing electrostatic charge image and method for preparing the same

9. 5427883 - Toner composition for electrophotography

10. 5279915 - Toner composition for electrophotography

11. 5202212 - Toner composition for electrophotography

12. 4963456 - Electrophotographic toner

13. 4833057 - Toner composition for the electrophotography

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as of
12/7/2025
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