Growing community of inventors

Tokyo, Japan

Masaaki Sakai

Average Co-Inventor Count = 2.36

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 = 325

Masaaki SakaiHiroyuki Tokuda (3 patents)Masaaki SakaiNaoki Tashiro (2 patents)Masaaki SakaiTatsuo Kojima (2 patents)Masaaki SakaiHiroyuki Saito (1 patent)Masaaki SakaiHideo Fushimoto (1 patent)Masaaki SakaiMasahiro Taniguro (1 patent)Masaaki SakaiKenichiro Hashimoto (1 patent)Masaaki SakaiHaruhiko Yamamoto (1 patent)Masaaki SakaiToshio Umino (1 patent)Masaaki SakaiYoshiaki Udagawa (1 patent)Masaaki SakaiKunihiko Ikeda (1 patent)Masaaki SakaiTadashi Shiina (1 patent)Masaaki SakaiToshihiko Sakow (1 patent)Masaaki SakaiJunichi Motoyoshi (1 patent)Masaaki SakaiMitsuhiko Nakata (1 patent)Masaaki SakaiKunio Hirose (1 patent)Masaaki SakaiSadao Ishihara (1 patent)Masaaki SakaiTetsuya Ishii (1 patent)Masaaki SakaiSakae Uematsu (1 patent)Masaaki SakaiTomohiko Hamada (1 patent)Masaaki SakaiKouji Katsuyama (1 patent)Masaaki SakaiTouma Shimoyama (1 patent)Masaaki SakaiMasaaki Sakai (15 patents)Hiroyuki TokudaHiroyuki Tokuda (77 patents)Naoki TashiroNaoki Tashiro (93 patents)Tatsuo KojimaTatsuo Kojima (14 patents)Hiroyuki SaitoHiroyuki Saito (126 patents)Hideo FushimotoHideo Fushimoto (36 patents)Masahiro TaniguroMasahiro Taniguro (30 patents)Kenichiro HashimotoKenichiro Hashimoto (20 patents)Haruhiko YamamotoHaruhiko Yamamoto (19 patents)Toshio UminoToshio Umino (18 patents)Yoshiaki UdagawaYoshiaki Udagawa (14 patents)Kunihiko IkedaKunihiko Ikeda (10 patents)Tadashi ShiinaTadashi Shiina (8 patents)Toshihiko SakowToshihiko Sakow (8 patents)Junichi MotoyoshiJunichi Motoyoshi (7 patents)Mitsuhiko NakataMitsuhiko Nakata (6 patents)Kunio HiroseKunio Hirose (6 patents)Sadao IshiharaSadao Ishihara (5 patents)Tetsuya IshiiTetsuya Ishii (5 patents)Sakae UematsuSakae Uematsu (4 patents)Tomohiko HamadaTomohiko Hamada (2 patents)Kouji KatsuyamaKouji Katsuyama (2 patents)Touma ShimoyamaTouma Shimoyama (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Canon Kabushiki Kaisha (12 from 90,594 patents)

2. Minolta Camera Kabushiki Kaisha (2 from 2,979 patents)

3. Fujitsu Corporation (1 from 39,228 patents)


15 patents:

1. 5529407 - Image recording apparatus

2. D325743 - Printing head for printer

3. D321002 - Laser beam printer

4. D321001 - Laser beam printer

5. D319655 - Laser beam printer

6. D319656 - Laser beam printer

7. D315360 - Printer for computer

8. D311526 - Opti-magnetic disc cartridge

9. 4838720 - Paper guide of printer for word-processor

10. 4729060 - Cooling system for electronic circuit device

11. D263967 - Desk top electronic calculator

12. D261528 - Desk top electronic calculator

13. D261273 - Desk top electronic calculator

14. D261146 - Electrostatic copier or similar article

15. D259348 - Combined desk top electronic calculator and clock

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as of
12/8/2025
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