Issued Patents All Time
Showing 51–68 of 68 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6490108 | Digital data recording method and apparatus, digital data reproducing apparatus, and magnetic tape therefor | — | 2002-12-03 |
| 6469239 | Data storage apparatus and data storage method with quality degrading features | — | 2002-10-22 |
| 6278569 | Signal recording apparatus and method | — | 2001-08-21 |
| 6175461 | Rotary head block with rotary transformer having separate channels for power signal and playback signal | Masahiro Suzuki, Toshihiro Kawakubo, Masanori Okazaki | 2001-01-16 |
| 5861780 | Variable frequency ring oscillator and phase locked loop circuit to which the ring oscillator is adapted | — | 1999-01-19 |
| 5844736 | Dual-mode digital signal recording and/or reproducing apparatus | Akio Tanaka, Kentaro Odaka | 1998-12-01 |
| 5644307 | Modulation method, recording method, reproducing method, recording and reproducing apparatus, recording and reproducing method, and reproducing apparatus | — | 1997-07-01 |
| 5615055 | Dual-mode digital signal recording and/or reproducing apparatus | Akio Tanaka, Kentaro Odaka | 1997-03-25 |
| 5428648 | Digital PLL circuit having signal edge position measurement | — | 1995-06-27 |
| 5313339 | Apparatus using a rotary head for recording digital video and audio signals at double speed | Tadashi Fukami, Masayoshi Noguchi, Makoto Yamada | 1994-05-17 |
| 5202801 | Integrated circuit for producing sensor detection signals in a recording/reproducing apparatus | — | 1993-04-13 |
| 5065413 | Phase locked loop circuit | — | 1991-11-12 |
| 4627289 | Method for the ultrasonic flaw detection of an electric welded pipe | Masaki Kajiyama, Takeshi Ikemoto | 1986-12-09 |
| 4626826 | Method and apparatus for encoding and decoding an NRZI digital signal with low DC component and minimum low frequency components | Yuichi Kojima | 1986-12-02 |
| 4617552 | Method and apparatus for converting a digital data | Yuichi Kojima | 1986-10-14 |
| 4598267 | Method and apparatus for converting a digital signal | — | 1986-07-01 |
| 4577180 | Digital data converting method and apparatus thereof | — | 1986-03-18 |
| 4523237 | Method and apparatus for recording and reproducing an analog signal | Kentaro Odaka | 1985-06-11 |