Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5703940 | Method and apparatus for delivering calling services | Steven E. Polsky | 1997-12-30 |
| 5644631 | Method and apparatus for delivering calling services | Steven E. Polsky | 1997-07-01 |