Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5882202 | Method and system for aiding foreign language instruction | Bert Sullam | 1999-03-16 |
| 5697789 | Method and system for aiding foreign language instruction | Bert Sullam | 1997-12-16 |