Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881221 | Method and apparatus for disabling an echo canceller on a digital telecommunications network | George L. Schroeder, Francis O. Couch | 1989-11-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881221 | Method and apparatus for disabling an echo canceller on a digital telecommunications network | George L. Schroeder, Francis O. Couch | 1989-11-14 |