Issued Patents 2005
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6978004 | System and method for providing a simultaneous ring service for multiple landline or wireless telecommunications units | — | 2005-12-20 |
| 6947534 | Telephone intercom methods and systems | Hong Thi Nguyen | 2005-09-20 |
| 6868268 | Audio calling name and number delivery | James A. Worsham, Greg N. Patterson, Zhiqiang Zeeman Zhang | 2005-03-15 |