Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6853256 | Voltage controlled oscillator with reference current generator | Kyoichi Takenaka | 2005-02-08 |
| 6784719 | Level shift circuit for transmitting signal from leading edge to trailing edge of input signal | Ryuta Okamoto, Kyoichi Takenaka | 2004-08-31 |
| 6696828 | Integrated circuit and lot selection system therefor | — | 2004-02-24 |
| 6611177 | Voltage controlled oscillator including fluctuation transmitter for transmitting potential fluctuation by noise | Kyoichi Takenaka | 2003-08-26 |
| 6538490 | Offset compensation circuit and offset compensation method | — | 2003-03-25 |
| 6323738 | Voltage-controlled ring oscillator with level converting and amplitude control circuits | Shuichi Takada | 2001-11-27 |
| 6259290 | Delay locked loop having a mis-lock detecting circuit | Shuichi Takada | 2001-07-10 |
| 6246271 | Frequency multiplier capable of generating a multiple output without feedback control | Shuichi Takada | 2001-06-12 |
| 6177846 | Ring oscillator type voltage controlled oscillator | Shuichi Takada | 2001-01-23 |
| 6163288 | Digital-to-analog converter in which an analog output of low order bits is attenuated, and added to an analog output of high order bits | — | 2000-12-19 |
| 6011444 | Voltage controlled oscillator circuit | Shuichi Takada | 2000-01-04 |
| 6005420 | Frequency multiplying circuit having a greater multiplying ratio | Shuichi Takada | 1999-12-21 |
| 5955902 | Frequency multiplier using a voltage controlled delay circuit | Shuichi Takada | 1999-09-21 |
| 5909474 | Phase-locked loop system | — | 1999-06-01 |
| 5898167 | Optical pick-up head and integrated type optical unit for use in optical pick-up head | Toru Musha, Hiroyuki Imabayashi, Hiroshi Miyajima | 1999-04-27 |
| 5814807 | Optical pick-up head and integrated type optical unit for use in optical pick-up head | Toru Musha, Hiroyuki Imabayashi, Hiroshi Miyajima | 1998-09-29 |
| 5804814 | Optical pick-up head and integrated type optical unit for use in optical pick-up head | Toru Musha, Hiroyuki Imabayashi, Hiroshi Miyajima | 1998-09-08 |
| 5631774 | Polarizing beam splitter and optical pick-up head comprising the same | — | 1997-05-20 |
| 5594391 | N-stage ring connected voltage controlled oscillator | — | 1997-01-14 |
| 5566142 | Apparatus using an optical pickup | Junichi Nakano, Nobuo Miyairi, Shohei Kobayashi | 1996-10-15 |
| 5432760 | Method of measuring phase difference of opto-magnetic record medium and apparatus for carrying out said method | Yasuhiro Fujiwara | 1995-07-11 |
| 5028774 | Method and apparatus for detecting and measuring the refractive index of an optical disc substrate | Yoshihiko Masakawa | 1991-07-02 |
| 4841510 | Optical characteristic measuring apparatus for an optical recording medium substrate | — | 1989-06-20 |
| 4837758 | Magneto-optical recording reproducing device having field applying means | Kazuyasu Motoyama, Tsuneo Yanagida, Mitsugu Sakai, Hitoshi Ichikawa | 1989-06-06 |
| 4792227 | Apparatus for measuring the refractive index of a substrate for an optical recording medium and method of measuring the same | — | 1988-12-20 |