USPTOProtect this trademark from copycats!
With our trademark monitoring alerts, you are automatically notified by email about copycats and free riders.
The US trademark KEYSTONE was filed as Word mark on 03/19/1992 at the U.S. Patent and Trademark Office.
It was registered as a trademark on 01/11/1994.
The current status of the mark is "CANCELLED - SECTION 8".
| Trademark form | Word mark |
| File reference | 74256985 |
| Register number | 1816390 |
| Application date | March 19, 1992 |
| Publication date | September 22, 1992 |
| Entry date | January 11, 1994 |
Trademark owner
P.O. Box 635
15501 Somerset
US
15501 Somerset
US
Trademark representatives
goods and services
10
oxygen concentrators for medical use and parts therefor; namely, replacement sieve beds, replacement compressors, replacement valves and replacement micro processor boards
ID: 1374256985