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The US trademark DUO-VENT was filed as Word mark on 03/19/1962 at the U.S. Patent and Trademark Office.
It was registered as a trademark on 10/01/1963.
The current status of the mark is "EXPIRED".
Trademark form | Word mark |
File reference | 72140124 |
Register number | 757570 |
Application date | March 19, 1962 |
Entry date | October 1, 1963 |
ID: 1372140124