Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6801607 | System and method for preventing fraudulent calls using a common billing number | Dean C. Marchand, Ron Zimmerman | 2004-10-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6801607 | System and method for preventing fraudulent calls using a common billing number | Dean C. Marchand, Ron Zimmerman | 2004-10-05 |