Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852151 | Modem with call waiting | Robert L. Richards, Raouf Halim | 1989-07-25 |
| 4799890 | Electronic learning device for teaching how to tell time | Barbara J. Thompson | 1989-01-24 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852151 | Modem with call waiting | Robert L. Richards, Raouf Halim | 1989-07-25 |
| 4799890 | Electronic learning device for teaching how to tell time | Barbara J. Thompson | 1989-01-24 |