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The US trademark HYDROHONE was filed as Word mark on 11/08/1937 at the U.S. Patent and Trademark Office.
It was registered as a trademark on 04/26/1938.
The current status of the mark is "EXPIRED".
| Trademark form | Word mark |
| File reference | 71399454 |
| Register number | 356386 |
| Application date | November 8, 1937 |
| Entry date | April 26, 1938 |
Trademark owner
TROY MICHIGAN
goods and services
7
HONE MACHINE FOR GRINDING CYLINDER WALLS
ID: 1371399454