Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7693214 | Receiving device and analog-to-digital conversion device | — | 2010-04-06 |
| 7590077 | Canceller device and data transmission system | — | 2009-09-15 |
| 6018558 | Signal disconnection detection circuit that ensures positive detection of signal disconnection | — | 2000-01-25 |
| 5392347 | Ringing tone signal detecting circuit | Tomokazu Ito | 1995-02-21 |