EK

Eiji Koyama

HM Hitachi Maxell: 20 patents #21 of 1,211Top 2%
HI Hitachi: 19 patents #1,906 of 28,497Top 7%
Sharp Kabushiki Kaisha: 19 patents #838 of 10,731Top 8%
HC Hitachi Industrial Equipment Systems Co.: 2 patents #215 of 550Top 40%
📍 Tsuchiura, JP: #6 of 519 inventorsTop 2%
Overall (All Time): #63,323 of 4,157,543Top 2%
46
Patents All Time

Issued Patents All Time

Showing 26–46 of 46 patents

Patent #TitleCo-InventorsDate
6472047 Magnetic recording disk Fumiyoshi Kirino, Nobuyuki Inaba, Hiroki Yamamoto, Ken Takahashi, Takashi Naitou +3 more 2002-10-29
6465151 Method of manufacturing optical discs Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima 2002-10-15
6410133 Magnetic recording disk, method of the magnetic recording disk and magnetic recording apparatus Fumiyoshi Kirino, Nobuyuki Inaba, Ken Takahashi, Takashi Naitou, Sumio Hosaka +3 more 2002-06-25
6316760 Solid-state imaging apparatus 2001-11-13
6140028 Optical recording and reproduction apparatus Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima 2000-10-31
5990951 Solid-state imaging device and method for driving the same 1999-11-23
5906907 Optical disc Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima 1999-05-25
5898460 Solid-state imaging device 1999-04-27
5786713 Driver circuit and a method for generating a driving signal Takashi Watanabe 1998-07-28
5783320 Magneto-optical recording medium and process for producing the same Katsusuke Shimazaki, Satoru Ohnuki, Masatoshi Hashimoto, Yoshinori Shirai, Norio Ohta +4 more 1998-07-21
5767902 Solid-state imaging device 1998-06-16
5686227 Optical reproduction apparatus Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima 1997-11-11
5637411 Magneto-optical recording medium and process for producing the same Katsusuke Shimazaki, Satoru Ohnuki, Masatoshi Hashimoto, Yoshinori Shirai, Norio Ohta +4 more 1997-06-10
5543271 Optical recording and reproduction apparatus Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima 1996-08-06
5427893 Optical data recording medium Akira Gotoh, Shuhei Nakamichi, Ryoichi Sudo, Hiroaki Miwa 1995-06-27
5401610 Optical disc Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima 1995-03-28
5323052 Image pickup device with wide angular response 1994-06-21
5306906 Solid-state imaging device having a plurality of charge transfer electrodes formed in a serpentine pattern Tetsuro Aoki, Ichiro Baba 1994-04-26
5244775 Method of manufacturing an optical disc Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima 1993-09-14
5234792 Optical data recording medium and manufacturing method thereof Akira Gotoh, Shuhei Nakamichi, Ryoichi Sudo, Hiroaki Miwa 1993-08-10
5132152 Optical recording medium and method for manufacturing the same Akira Gotoh, Shuhei Nakamichi 1992-07-21