Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888822 | Apparatus and method for determining cost of telephone calls | Roger C. Lee, Stanley F. Miller | 1989-12-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888822 | Apparatus and method for determining cost of telephone calls | Roger C. Lee, Stanley F. Miller | 1989-12-19 |