| Mark Text | Image | Register | NICE classifications | Registration Date | Expiry Date | ||
|---|---|---|---|---|---|---|---|
| SPEECHLOGIC | United States Patent and Trademark Office | 9 | 2005-01-04 | 2014-05-12 | historic | details | |
| VISUAL PROLOG | United States Patent and Trademark Office | 9 | 1996-09-17 | 2007-06-23 | historic | details | |
| PROLOG DEVELOPMENT CENTER |
|
United States Patent and Trademark Office | 9 | 1991-02-26 | 1997-09-01 | historic | details |