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The US trademark DUO FLOW was filed as Word mark on 11/26/1965 at the U.S. Patent and Trademark Office.
It was registered as a trademark on 06/20/1967.
The current status of the mark is "EXPIRED".
| Trademark form | Word mark |
| File reference | 72233303 |
| Register number | 830478 |
| Application date | November 26, 1965 |
| Entry date | June 20, 1967 |
Trademark owner
40 W. 40TH ST. NEW YORK, N.Y.
goods and services
9
THERMOSTATICALLY-OPERATED VALVES FOR CONTROLLING HOT AND COLD WATER FLOWS THROUGH ROOM HEAT EXCHANGE UNITS
ID: 1372233303