Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6961425 | Socket/plug in DTMF tone dialer | — | 2005-11-01 |
| 6940974 | Systems and methods for generating tones for operating telephones | Thomas Heinrich Sternberg, Mathieu Garret Schneider | 2005-09-06 |