Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
MA

Masaaki Aoki — 53 Patents

Hitachi: 18 patents #2,067 of 28,497Top 8%
SCSumitomo Special Metals Co.: 17 patents #7 of 262Top 3%
NCNeomax Co.: 8 patents #6 of 95Top 7%
Mazda Motor: 2 patents #1,722 of 4,755Top 40%
SKShowa Shell Sekiyu K.K.: 2 patents #17 of 82Top 25%
TITexas Instruments: 2 patents #5,248 of 12,488Top 45%
NDNtt Docomo: 1 patents #1,030 of 1,706Top 65%
HSHitachi Automotive Systems Steering: 1 patents #28 of 48Top 60%
HUHiroshima University: 1 patents #158 of 421Top 40%
SCShin Meiwa Industry Co.: 1 patents #23 of 74Top 35%
Sumitomo Electric Industries: 1 patents #13,249 of 21,551Top 65%
Overall (All Time): #49,054 of 4,157,543Top 2%
53 Patents All Time

Issued Patents All Time

Showing 26–50 of 53 patents

Patent #TitleCo-InventorsDate
D461249 Magnetic field generating device for use in MRI Tsuyoshi Tsuzaki, Hitoshi Yoshino, Masayuki Nakatsu 2002-08-06
6340888 Magnetic field generator for MRI Shigeo Hashimoto 2002-01-22
6336989 Magnetic field generator for MRI, method for assembling the same, and method for assembling a magnet unit for the same Shigeo Hashimoto 2002-01-08
6313632 Magnetic field generator for MRI, packing member for the same, and method for packing the same Shigeo Hashimoto 2001-11-06
6307233 Electrically isolated double gated transistor Kaoru Awaka, Masashi Hashimoto 2001-10-23
6297634 MRI magnetic field generator 2001-10-02
6275128 MRI magnetic field generator Shigeo Hashimoto 2001-08-14
D439668 Magnetic field generating device for use in MRI Tsuyoshi Tsuzaki 2001-03-27
D438619 Magnetic field generating device for use in MRI Shigemasu Okada, Shigeo Hashimoto 2001-03-06
5621324 Magnetic field generator for MRI Kimiharu Ota, Hiroyuki Takeuchi, Yasuhiro Marukawa, Hirotaka Takeshima, Chikako Nakamura 1997-04-15
5557205 Magnetic field generating apparatus for use in MRI Kimiharu Ohta 1996-09-17
5488266 Electro-luminescence device Isao Yokotsuka, Yoshihiro Ogata 1996-01-30
5465091 Touch sensor Atsushi Nishino, Akihiko Yoshida, Teruo Namba, Atsushi Naito 1995-11-07
5442196 Superconducting device Toshikazu Nishino, Mutsuko Miyake, Ushio Kawabe, Yutaka Harada, Mikio Hirano 1995-08-15
5311036 Superconducting device Toshikazu Nishino, Mutsuko Miyake, Ushio Kawabe, Yutaka Harada, Mikio Hirano 1994-05-10
5283544 Magnetic field generating device used for MRI Hideya Sakurai 1994-02-01
5229723 Magnetic field generating device for MRI Hideya Sakurai, Youichi Ohnishi 1993-07-20
5126801 Superconducting device Toshikazu Nishino, Mutsuko Miyake, Ushio Kawabe, Yutaka Harada, Mikio Hirano 1992-06-30
5091325 Process for making MOS devices for low-temperature operation Shoji Hanamura, Toshiaki Masuhara 1992-02-25
5041892 Homo-junction bipolar transistor having high base concentration and suitable for low temperature operation Kazuo Yano, Toshiaki Masuhara, Katsuhiro Shimohigashi 1991-08-20
4949145 Homo-junction bipolar transistor having high base concentration and suitable for low temperature operation Kazuo Yano, Toshiaki Masuhara, Katsuhiro Shimohigashi 1990-08-14
4884111 Superconducting device Toshikazu Nishino, Mutsuko Miyake, Ushio Kawabe, Yutaka Harada, Mikio Hirano 1989-11-28
4864382 Semiconductor device Kazuo Yano, Toshiaki Masuhara 1989-09-05
4768076 Recrystallized CMOS with different crystal planes Toshiaki Masuhara, Terunori Warabisako, Shoji Hanamura, Yoshio Sakai, Seiichi Isomae +2 more 1988-08-30
4710648 Semiconductor including signal processor and transient detector for low temperature operation Shoji Hanamura, Toshiaki Masuhara 1987-12-01