Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8503644 | Method of and a communications system for playing a message to a calling party | Jos den Hartog | 2013-08-06 |
| 8325887 | Method of and a communications system for providing, to a calling party, information concerning a message played to the calling party | Rogier August Caspar Joseph Noldus, Jos den Hartog | 2012-12-04 |