Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9711176 | Multilayer optical information recording disk and method for manufacturing same | Tatsuo Mikami, Atsushi Tatsugawa | 2017-07-18 |
| 9105283 | Optical information recording medium | Tatsuo Mikami | 2015-08-11 |
| 9099106 | Multilayer structure sheet and method for manufacturing same, and optical information recording medium and method for manufacturing optical information recording medium using multilayer structure sheet | Hidehiro Mochizuki, Tatsuo Mikami | 2015-08-04 |
| 8980396 | Optical information recording medium | — | 2015-03-17 |
| 8701133 | Optical information recording medium and method for manufacturing same | — | 2014-04-15 |
| 8670296 | Optical information recording medium and optical information recording method | Hidehiro Mochizuki, Toshio Sasaki | 2014-03-11 |
| 8644126 | Optical information recording medium and method for manufacturing same | — | 2014-02-04 |
| 8503281 | Optical recording disc and method for recording or reading data on the optical recording disc | Tatsuo Mikami | 2013-08-06 |
| 8477577 | Method for recording on and reading out from optical information recording medium | Toshio Sasaki, Hidehiro Mochizuki | 2013-07-02 |
| 8427915 | Method and apparatus for recording information in optical storage medium, and multi-layer optical storage medium | — | 2013-04-23 |
| 8202597 | Multilayer optical recording medium, method and apparatus for manufacturing the multilayer optical recording medium | Toshio Ishida, Katsuhiko Meguro | 2012-06-19 |
| 7929403 | Apparatus and method for recording information in optical storage medium | — | 2011-04-19 |
| 7564640 | Apparatus for recording or retrieving data on magnetic tape | — | 2009-07-21 |
| 7207052 | Recording medium cartridge and recording and reproducing device | — | 2007-04-17 |
| 7095582 | Magnetic tape drive | — | 2006-08-22 |
| 7092200 | Magnetic tape drive with recording head group providing high density data signal recording | — | 2006-08-15 |
| 6767610 | Magnetic tape having specific surface recording density and comprising a support having specific surface roughness | Masatoshi Takahashi, Minoru Sueki | 2004-07-27 |
| 6251509 | Magnetic tape | Toshio Kawamata, Minoru Sueki | 2001-06-26 |
| 5804283 | Magnetic recording medium | Hiroo Inaba, Masaki Suzuki, Naoto Abe, Satoshi Matsubaguchi, Hiroaki Takano | 1998-09-08 |
| 5512350 | Magnetic recording medium having a magnetic layer with a specified surface roughness and which contains ferromagnetic powder, binder, and an abrasive | Katsumi Ryoke, Katsuhiko Meguro, Hiroaki Doushita, Masaki Suzuki, Masami Sato | 1996-04-30 |
| 5407725 | Magnetic recording medium having a magnetic layer containing two carbon blacks each within specific particle size and DBP adsorption ranges | Katsumi Ryoke, Yutaka Kakuishi, Tetsuji Nishida | 1995-04-18 |
| 5326618 | Magnetic recording medium and process for production thereof | Katsumi Ryoke, Yutaka Kakuishi, Akihiro Matsufuji | 1994-07-05 |
| 5196265 | Magnetic recording medium | Katsumi Ryoke, Yutaka Kakuishi | 1993-03-23 |