Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8258452 | Light receiving circuit | — | 2012-09-04 |
| 8004440 | Transimpedance amplifier and analog-digital converter circuit | — | 2011-08-23 |
| 6147509 | Semiconductor logical device capable of circuit switching without being influenced by transitional effects | — | 2000-11-14 |
| 5523669 | Charging circuit capable of supplying DC voltage directly to power supply circuit when battery is removed | Yasuhiro Shirakawa | 1996-06-04 |