Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6259708 | System and method of transmitting voice over digital subscriber line | Yaqi Cheng, Walter Y. Chen, Michael O. Polley | 2001-07-10 |
| 5310996 | Method and apparatus for determining recording time available on a videotape cassette | John A. Canal | 1994-05-10 |