Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6625168 | SYSTEM AND METHOD FOR CONTROLLING AND MONITORING FIRST TELECOMMUNICATION TERMINAL DEVICES CONNECTED TO PRIVATE BRANCH EXCHANGES OR SECOND TELECOMMUNICATION TERMINAL DEVICES COUPLED TO LONG DISTANCE NETWORKS | Dirk Riesenbeck, Frank Schindel, Erwin Tanger, Rainer Zimmermann | 2003-09-23 |