Issued Patents All Time
Showing 26–50 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6392454 | Shunt regulated push-pull circuit having wide frequency range | — | 2002-05-21 |
| 5942935 | Filter circuit | — | 1999-08-24 |
| 5758270 | Level control circuit for receiver | — | 1998-05-26 |
| 5757921 | Radio communication apparatus having common oscillator applied for PLL, conversion and scramble/descramble circuits | Nobuo Hareyama, Hiroshi Yokoyama | 1998-05-26 |
| 5758265 | Transmitting and receiving apparatus for incorporation into an integrated circuit | — | 1998-05-26 |
| 5710997 | Superheterodyne receiver apparatus | — | 1998-01-20 |
| 5584066 | Correcting circuit for mixing circuit receiver using same and frequency spectrum inverting circuit using same | — | 1996-12-10 |
| 5566365 | Active filter circuit and portable telephone apparatus | Satoshi Yokoya, Yukinobu Kawamura | 1996-10-15 |
| 5428835 | AM receiver on semi-conductor with internally generated oscillation signal representing if band pass filter center frequency deviation | — | 1995-06-27 |
| 5404587 | AFC circuit and IC of the same adapted for lower heterodyne conversion and upper heterodyne conversion | — | 1995-04-04 |
| 5349285 | Power supply circuit | — | 1994-09-20 |
| 5300826 | Interface circuit for audio signal | Hitoshi Tomiyama | 1994-04-05 |
| 5285172 | Current mirror power amplifier with gain controlled by resistor-capacitor network | Hitoshi Tomiyama | 1994-02-08 |
| 5020147 | FM/AM broadcast signal converter | — | 1991-05-28 |
| 4965528 | Cross-coupled differential amplifier | — | 1990-10-23 |
| 4933972 | Stereo multiplex demodulator | — | 1990-06-12 |
| 4739517 | Autodyne receiver | — | 1988-04-19 |
| 4703292 | Tuning circuit apparatus | — | 1987-10-27 |
| 4659949 | Phase-locked loop circuit | — | 1987-04-21 |
| 4639659 | DC-DC converter | — | 1987-01-27 |
| 4629914 | Phase comparing circuit | — | 1986-12-16 |
| 4581593 | Variable frequency oscillating circuit | — | 1986-04-08 |
| 4578807 | FM stereo multiplex demodulator | — | 1986-03-25 |
| 4567444 | Current mirror circuit with control means for establishing an input-output current ratio | — | 1986-01-28 |
| 4560920 | Voltage to current converting circuit | — | 1985-12-24 |