Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6810120 | Method of determining answer supervision at a line appearance of a public switch telephone network | Michael J. Elder, Joseph Kott, Jane Ann Thompson, Robin Jeffrey Thompson, Kimberly Sue Tomasko-Dean | 2004-10-26 |