OK

Osamu Koizumi

HI Hitachi: 51 patents #272 of 28,497Top 1%
HC Hitachi Car Engineering Co.: 29 patents #5 of 465Top 2%
SO Sony: 22 patents #1,822 of 25,231Top 8%
TL Tokyo Electron Limited: 13 patents #516 of 5,567Top 10%
3M: 2 patents #5,326 of 11,543Top 50%
HC Hitachi Automotive Engineering Co.: 1 patents #156 of 314Top 50%
Casio Computer Co.: 1 patents #1,284 of 1,970Top 70%
AM Asahi Kasei Microdevices: 1 patents #116 of 231Top 55%
Overall (All Time): #18,455 of 4,157,543Top 1%
89
Patents All Time

Issued Patents All Time

Showing 51–75 of 89 patents

Patent #TitleCo-InventorsDate
5917684 Magnetic head apparatus, tape cartridge and recording/reproducing apparatus for increasing tape stability Takashi Sato, Kengo Saito, Masanori Sato 1999-06-29
5886433 Dynamoelectric machine Keiji Oda, Hiroshi Hamano, Suetaro Shibukawa, Kiyoshi Hirano 1999-03-23
5872692 Recording/reproducing apparatus, magnetic head and tape cartridge Kengo Saito, Ikushi Nakashima, Masanori Sato, Shinji Masugi, Noriko Nakazawa 1999-02-16
5860523 Tape cassette receiving housing Toshikazu Konno, Hiroshi Ozaki, Kiyoshi Urayama, Takashi Ota, Seiji Nihei +2 more 1999-01-19
5850980 Tape cassette 1998-12-22
5850316 Tape cartridge and driving system having rotation detection unit for drive roll to maintain constant contact pressure with the capstan roll Masanori Sato, Kengo Saito 1998-12-15
5847906 Recording/reproducing apparatus, magnetic head and tape cartridge Kengo Saito, Ikushi Nakashima, Masanori Sato, Shinji Masugi, Noriko Nakazawa 1998-12-08
5811904 Permanent magnet dynamo electric machine Fumio Tajima, Yutaka Matsunobu, Shouichi Kawamata, Suetaro Shibukawa, Keiji Oda 1998-09-22
5757579 Data cartridge drive for receiving data cartridges of varied memory capacity 1998-05-26
5744880 Rotating motor and motor-driven vehicle Mitsuo Kudoh, Toshihiko Fukushima, Suetato Shibukawa, Fumio Tajima, Syouichi Kawamata +1 more 1998-04-28
5699209 Data cartridge drive 1997-12-16
5690224 Storage case for tape cassette 1997-11-25
5678760 Cooling system of electric automobile and electric motor used therefor Masanori Muso, Keiji Oda, Hiroshi Hamano 1997-10-21
5562258 Belt driven cartridge for guiding tape with reduced offtracking Masanori Sato 1996-10-08
5504644 Recording/erasing prevention device Kazuo Sasaki 1996-04-02
D367050 Magnetic tape cartridge Taizou Aizawa 1996-02-13
5474249 Method for producing tape leaders for hubs Takayasu Hirano 1995-12-12
5335131 Tape cartridge having a transparent panel covering the tape sensing opening Masanori Sato 1994-08-02
RE34629 Method and apparatus for loading ink ribbon Mitsuo Uchimura, Seiji Koike, Takeshi Tashiro, Kazuhiro Fushimi, Ikuzo Sugiura 1994-06-07
5287240 Tape cassette Kengo Saito, Kazuo Sasaki, Masayuki Itabashi 1994-02-15
5239436 Tape cartridge with increased tape capacity Taizo Aizawa, Kengo Saito, Takayasu Hirano 1993-08-24
5204796 Tape cassette with tape tension controlled by grease of a specified range of viscosity Kengo Saito, Kazuo Sasaki, Masayuki Itabashi 1993-04-20
5174667 Transfer printer Kazuaki Sugimoto, Ikuzo Sugiura, Satoshi Kitahara 1992-12-29
5118208 Printer with interlocked movable platen and presser Satoshi Kitahara 1992-06-02
5106215 Transfer printer with removable print head Satoshi Kitahara, Ikuzo Sugiura 1992-04-21