Growing community of inventors

Tokyo, Japan

Keiji Sakai

Average Co-Inventor Count = 2.66

ph-index = 9

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 = 337

Keiji SakaiMinori Noguchi (7 patents)Keiji SakaiHidetoshi Nishiyama (7 patents)Keiji SakaiTakahiro Jingu (7 patents)Keiji SakaiTakanori Ninomiya (7 patents)Keiji SakaiShunichi Matsumoto (7 patents)Keiji SakaiYoshimasa Ohshima (7 patents)Keiji SakaiYukio Kembo (7 patents)Keiji SakaiYoshio Morishige (7 patents)Keiji SakaiShuichi Chikamatsu (7 patents)Keiji SakaiHisato Nakamura (7 patents)Keiji SakaiRyouji Matsunaga (7 patents)Keiji SakaiTetsuya Watanabe (6 patents)Keiji SakaiYoshiyuki Kato (2 patents)Keiji SakaiMasanori Yasuda (2 patents)Keiji SakaiTadao Saito (1 patent)Keiji SakaiTetsuichi Kudo (1 patent)Keiji SakaiHiroshi Abe (1 patent)Keiji SakaiEiko Hibari (1 patent)Keiji SakaiYasuo Takeda (1 patent)Keiji SakaiEiichi Yoshikawa (1 patent)Keiji SakaiHideo Atsumi (1 patent)Keiji SakaiYoshikatsu Okada (1 patent)Keiji SakaiItaru Honma (1 patent)Keiji SakaiMasaru Miyayama (1 patent)Keiji SakaiShigeru Yamada (1 patent)Keiji SakaiKen Urata (1 patent)Keiji SakaiTatsuo Osaka (1 patent)Keiji SakaiTetsuyai Watanabe (1 patent)Keiji SakaiTomoki Ishiwata (1 patent)Keiji SakaiHibari Eiko (0 patent)Keiji SakaiKeiji Sakai (19 patents)Minori NoguchiMinori Noguchi (113 patents)Hidetoshi NishiyamaHidetoshi Nishiyama (109 patents)Takahiro JinguTakahiro Jingu (66 patents)Takanori NinomiyaTakanori Ninomiya (64 patents)Shunichi MatsumotoShunichi Matsumoto (58 patents)Yoshimasa OhshimaYoshimasa Ohshima (53 patents)Yukio KemboYukio Kembo (36 patents)Yoshio MorishigeYoshio Morishige (22 patents)Shuichi ChikamatsuShuichi Chikamatsu (21 patents)Hisato NakamuraHisato Nakamura (14 patents)Ryouji MatsunagaRyouji Matsunaga (7 patents)Tetsuya WatanabeTetsuya Watanabe (37 patents)Yoshiyuki KatoYoshiyuki Kato (58 patents)Masanori YasudaMasanori Yasuda (4 patents)Tadao SaitoTadao Saito (77 patents)Tetsuichi KudoTetsuichi Kudo (20 patents)Hiroshi AbeHiroshi Abe (11 patents)Eiko HibariEiko Hibari (10 patents)Yasuo TakedaYasuo Takeda (9 patents)Eiichi YoshikawaEiichi Yoshikawa (7 patents)Hideo AtsumiHideo Atsumi (6 patents)Yoshikatsu OkadaYoshikatsu Okada (5 patents)Itaru HonmaItaru Honma (4 patents)Masaru MiyayamaMasaru Miyayama (3 patents)Shigeru YamadaShigeru Yamada (3 patents)Ken UrataKen Urata (2 patents)Tatsuo OsakaTatsuo Osaka (1 patent)Tetsuyai WatanabeTetsuyai Watanabe (1 patent)Tomoki IshiwataTomoki Ishiwata (1 patent)Hibari EikoHibari Eiko (0 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi, Ltd. (6 from 42,485 patents)

2. Hitachi-high-technologies Corporation (6 from 2,874 patents)

3. Laurel Bank Machines Company, Ltd. (3 from 138 patents)

4. The University of Tokyo (2 from 1,278 patents)

5. Laurel Precision Machines Co., Ltd. (2 from 53 patents)

6. The Foundation for the Promotion of Industrial Science (2 from 29 patents)

7. Kyoto Electronics Manufacturing Company, Limited (2 from 17 patents)

8. Other (1 from 832,680 patents)

9. Canon Kabushiki Kaisha (1 from 90,594 patents)

10. Hitachi Maxell, Limited (1 from 1,112 patents)


19 patents:

1. 10184872 - Viscosity/elasticity measurement device and measurement method

2. 10168267 - Rotational speed detection device, viscosity measurement device using the device, rotational speed detection method, and rotating object used in the method

3. 9518908 - Fluid mechanical property measurement method and measurement device

4. 9372141 - Viscosity measuring apparatus

5. 8757348 - Paper money input and output device

6. 8365582 - Device for measuring viscosity/elasticity and method for measuring viscosity/elasticity

7. 7940383 - Method of detecting defects on an object

8. 7882942 - Coin bar storage

9. 7692779 - Apparatus and method for testing defects

10. 7639350 - Apparatus and method for testing defects

11. 7625673 - Electrode material for electrochemical element and method for production thereof, and electrochemical element

12. 7486403 - Droplet shape measuring method and apparatus

13. 7443496 - Apparatus and method for testing defects

14. 7098055 - Apparatus and method for testing defects

15. 7037735 - Apparatus and method for testing defects

Please report any incorrect information to support@idiyas.com
idiyas.com
as of
12/3/2025
Loading…