Issued Patents All Time
Showing 151–175 of 228 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5625388 | Overwritable optical recording medium and recording method of the same | Masahiko Takahashi | 1997-04-29 |
| 5614938 | Three-dimensional recording and reproducing apparatus | Hisataka Sugiyama, Kiyoshi Matsumoto, Motoyasu Terao, Shigenori Okamine, Tetsuya Nishida +1 more | 1997-03-25 |
| RE35435 | Method and apparatus for information recording and reproduction of a pit-shape-forming optical recording type | Atsushi Saito, Hisataka Sugiyama, Wasao Takasugi | 1997-01-28 |
| 5590111 | Method of controlling recording of optical records | Fumiyoshi Kirino, Hiroshi Ide, Toshimitsu Kaku, Seiichi Mita, Kazuo Shigematsu +1 more | 1996-12-31 |
| 5576728 | Driving method for an electrooptical device | — | 1996-11-19 |
| 5574881 | High capacity data storage method and system using independently controlled heads and circuitry for monitoring access frequency of data records | Hiroshi Yasuoka, Yoshito Tsunoda, Yoshihisa Kamo, Hiromichi Fujisawa, Zenji Tsutsumi +1 more | 1996-11-12 |
| 5572503 | Correcting non-linear distortions of optical information with a non-linear equalizer | Naoki Satoh, Atsushi Saito, Hisataka Sugiyama, Hirofumi Sukeda, Hiroyuki Tsuchinaga +1 more | 1996-11-05 |
| 5559777 | Optical recording method employing pit edge recording on recording medium divided into a plurality of zones wherein recording parameters vary from zone to zone | Shinichi Arai, Kazuo Isaka, Atsushi Saito, Takuya Mizokami, Hisataka Sugiyama +1 more | 1996-09-24 |
| 5553051 | Increased intensity optical recording medium with adjacent grooves of different optical depth and a method and apparatus for reproducing the same | Hisataka Sugiyama, Hiroshi Ide, Kazuo Shigematsu, Masaru Ito | 1996-09-03 |
| 5524103 | Disk record medium, and method and apparatus for recording and reproducing information onto and from the same | Kikuo Shimizu, Shinichi Arai, Takuya Mizokami, Atsushi Saito | 1996-06-04 |
| 5513165 | Method for controlling the farm of a magnetic domain of a magneto-optical disk using pre-write testing | Hiroshi Ide, Fumiyoshi Kirino, Tsuyashi Toda, Hiroyuki Tsuchinaga, Fumio Kugiya +4 more | 1996-04-30 |
| 5511050 | Focus error detecting method and optical head using the same | Kiyoshi Matsumoto, Shigeru Nakamura, Mariko Umeda, Masuo Kasai | 1996-04-23 |
| 5491683 | Optical information recording/reproducing method | Hisataka Sugiyama, Hirofumi Sukeda, Kouichirou Wakabayashi | 1996-02-13 |
| 5491678 | Method and apparatus for recording/reproducing information data in a two-dimensional format | Atsushi Saito, Hiroshi Ide | 1996-02-13 |
| 5463600 | Magneto-optical recording system using recording waveform having a plurality of power levels providing high recording density | Fumiyoshi Kirino, Atsushi Saito, Tsuyoshi Toda, Hiroshi Ide, Hiroyuki Tsuchinaga +1 more | 1995-10-31 |
| 5457666 | Light modulation method for forming a mark in magneto-optical recording system | Tsuyoshi Toda, Hiroshi Ide, Fumiyoshi Kirino, Hiroyuki Tsuchinaga, Toshimitsu Kaku +2 more | 1995-10-10 |
| 5448544 | Data recording/playback apparatus and signal processing method | Hiroyuki Tsuchinaga, Kiyoshi Matsumoto | 1995-09-05 |
| 5418770 | Method of and apparatus for correcting edge interval of pit in optical recording/read-out apparatus | Hiroshi Ide, Atsushi Saito | 1995-05-23 |
| 5414451 | Three-dimensional recording and reproducing apparatus | Hisataka Sugiyama, Kiyoshi Matsumoto, Motoyasu Terao, Shigenori Okamine, Tetsuya Nishida +1 more | 1995-05-09 |
| 5414689 | Optical information recording/reproducing apparatus using pit edge recording system | Shinichi Arai, Kazuo Isaka, Atsushi Saito, Takuya Mizokami, Histaka Sugiyama +1 more | 1995-05-09 |
| 5396477 | Light spot positioning method and optical disc memory apparatus employing the same | Kiyoshi Matsumoto, Masuo Kasai | 1995-03-07 |
| 5377178 | Data recording/reproducing method and apparatus using a recording medium having clock marks recorded in a wobbled track for read/write synchronization | Takeshi Nakao, Kiyoshi Matsumoto, Atsushi Saito, Hiroyuki Minemura, Tetsuya Fushimi | 1994-12-27 |
| 5345434 | Method and apparatus for correcting edge interval of record signal in an optical record/read-out apparatus | Hiroshi Ide | 1994-09-06 |
| 5333126 | Information recording method and optical disk apparatus using same | Yasushi Fukuda, Hiroshi Ide, Atsushi Saito, Fumiyoshi Kirino, Tsuyoshi Toda | 1994-07-26 |
| 5255261 | Information recording disk | Tamotsu Iida, Shinichi Arai | 1993-10-19 |