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The US trademark PSTN was filed as Word mark on 10/24/1991 at the U.S. Patent and Trademark Office.
It was registered as a trademark on 09/01/1992.
The current status of the mark is "CANCELLED - SECTION 8".
Trademark form | Word mark |
File reference | 74215012 |
Register number | 1711381 |
Application date | October 24, 1991 |
Publication date | June 9, 1992 |
Entry date | September 1, 1992 |
ID: 1374215012