Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5083272 | Interactive telephone lottery system with a verification code | Robert W. Walker, Ricki S. Karp | 1992-01-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5083272 | Interactive telephone lottery system with a verification code | Robert W. Walker, Ricki S. Karp | 1992-01-21 |