YM

Yoshihito Maeda

HI Hitachi: 13 patents #3,142 of 28,497Top 15%
HC Hitachi Koki Co.: 1 patents #557 of 888Top 65%
Overall (All Time): #390,051 of 4,157,543Top 10%
13
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
RE36624 Optical recording media and information recording and reproducing units Isao Ikuta, Hisashi Andoh, Masaichi Nagai, Yoshimi Katoh, Yoshio Sato +2 more 2000-03-21
5828431 Reflective-type display device having a refractive index ratio between light scatterers and host between 1 and 1.8 Masahiko Ando, Tohru Sasaki, Masaaki Kitajima, Osamu Itoh, Yoshiharu Nagae +1 more 1998-10-27
5668590 Optical beam scanning system with rotating beam compensation Seiji Maruo, Akira Arimoto, Tatsuya Sugita 1997-09-16
5583840 ROM type optical recording medium with a high reflectivity and an optical head operable on ROM, write-one and rewritable disk Hiroyuki Minemura, Yoshio Sato, Nobuyoshi Tsuboi, Hisashi Andoh, Masaichi Nagai +4 more 1996-12-10
5572502 Optical disk apparatus Atsuko Naruse, Yoshimi Kato, Isao Ikuta, Hisashi Andoh, Masaichi Nagai +4 more 1996-11-05
5484686 Optical recording media and information recording and reproducing units Isao Ikuta, Hisashi Andoh, Masaichi Nagai, Yoshimi Katoh, Yoshio Sato +2 more 1996-01-16
5475656 Optical disk memory and information processing apparatus Yoshio Sato, Nobuyoshi Tsuboi, Hiroyuki Minemura, Hisashi Andoh, Masaichi Nagai +4 more 1995-12-12
5420845 Methods of varying optical properties, optical devices, information recording media and information recording methods and apparatuses Isao Ikuta, Masaichi Nagai, Yoshimi Kato, Hisashi Andoh, Nobuo Tsukamoto 1995-05-30
5371730 Optical memory and information processing apparatus Isao Ikuta, Masaichi Nagai, Yoshimi Katou, Hisashi Andoh, Nobuyoshi Tsuboi +4 more 1994-12-06
5317556 Information processing apparatus and optical head incorporated therein Nobuyoshi Tsuboi, Yoshio Sato, Hiroyuki Minemura, Hisashi Andoh, Masaichi Nagai +4 more 1994-05-31
5274612 Information processor and disk memory used in the same Yoshio Sato, Nobuyoshi Tsuboi, Hiroyuki Minemura, Hisashi Andoh, Masaichi Nagai +4 more 1993-12-28
5187052 Optical recording medium Toshiki Kaneko, Masaichi Nagai, Hisashi Andoh, Yoshimi Katou, Isao Ikuta +1 more 1993-02-16
4651172 Information recording medium Ryuji Watanabe, Tetsuro Minemura, Tetsuo Ito, Hisashi Ando, Masaichi Nagai +3 more 1987-03-17