Issued Patents All Time
Showing 226–250 of 267 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5347504 | Optical disk apparatus for optically recording or reproducing information on an optical recording medium | Noboru Ito, Hidenori Wada, Sadao Mizuno, Hideki Hayashi | 1994-09-13 |
| 5345072 | Focus detection device for reading information from an optical recording medium | Hideki Hayashi, Sadao Mizuno, Noboru Ito, Yoshiaki Komma | 1994-09-06 |
| 5276674 | Optical recording medium having thin protective layer and two-dimensionally aligned code words and recording/reproducing apparatus employing the same | — | 1994-01-04 |
| 5252846 | Semiconductor memory device with an improved erroneous write characteristic and erasure characteristic | Masayuki Hori, Kazunori Kanebako, Noriyoshi Tozawa | 1993-10-12 |
| 5241528 | Optical pickup | Masanari Mohri, Hironori Tomita, Atsushi Ishizuka, Tohru Nakamura | 1993-08-31 |
| 5206853 | Apparatus and method for detecting intersymbol interference | — | 1993-04-27 |
| 5172405 | Answering machine arrangement | — | 1992-12-15 |
| 5157975 | Coriolis mass flow meter employing non-metallic flow conduit structure | Jun Morita, Hiroshi Yamamoto | 1992-10-27 |
| 5088080 | Apparatus for deriving synchronizing signal from pre-formed marks on record carrier | Hiromichi Ishibashi | 1992-02-11 |
| 5074167 | Automatic transmission | Hiroshi Yoshimura, Kouzou Ishii | 1991-12-24 |
| 5031167 | Focus error detection system for an optical recording/reproducing system | Hiromichi Ishibashi, Akira Matsubara, Tsuyoshi Okada | 1991-07-09 |
| 5016258 | Digital modulator and demodulator | Hiromichi Ishibashi, Akira Mitsubara, Tsuyoshi Okada | 1991-05-14 |
| 5008669 | Encoding/decoding system for optical recording/reading | Hiromichi Ishibashi | 1991-04-16 |
| 4998235 | Focus detection system for an optical disk drive using photo sensor elements in the far field of information pits | Hiromichi Ishibashi, Akira Matsubara, Tsuyoshi Okada | 1991-03-05 |
| 4996572 | Semiconductor memory device | Masayuki Hori, Noriyoshi Tozawa | 1991-02-26 |
| 4979162 | Apparatus for detecting the secondary distortion of optical type recorded information | Kiyoshi Kimoto | 1990-12-18 |
| 4927247 | Objective lens for optical disk system and optical head using the same | Yasuhiro Tanaka, Masaaki Sunohara, Yasuo Nakajima | 1990-05-22 |
| 4888631 | Semiconductor dynamic memory device | Daisuke Azuma, Yoshiji Ohta | 1989-12-19 |
| 4875202 | Disk-type storage medium recording/reproducing apparatus | Toshikazu Kodo | 1989-10-17 |
| 4862295 | Method of formatting a storage medium and drive unit for controlling the reading and writing of data on the formatted storage medium | Shigeru Matsukawa | 1989-08-29 |
| 4852126 | Digital information reproducing apparatus | Toshikazu Koudo, Tohru Kushisaka | 1989-07-25 |
| 4835505 | Magnetic ring for detecting the rotation of an object | Kenji Hattori, Hiroshi Tanaka | 1989-05-30 |
| 4823334 | Optical head with easily adjustable collimator having two lens components | Hiromichi Ishibashi | 1989-04-18 |
| 4785441 | Tracking error correction apparatus utilizing phase difference information derived from four photocells | Haruo Isaka, Hiroshi Yasuda, Toshiki Itoi | 1988-11-15 |
| 4761774 | Optical disc drive apparatus | Hiromichi Ishibashi, Ryosuke Shimizu, Makoto Kuwamoto, Hajime Yamamoto | 1988-08-02 |