FILTER ALERT CORPORATION Trademarks
THE DIRTY FILTER ALARM
Filed: March 7, 1988
AIR FLOW SENSORS
Owned by: FILTER ALERT CORPORATION
Serial Number: 73715038
FILTERTONE
Filed: March 9, 1988
ALARM UNITS FOR USE WITH AIR CONDITIONING AND HEATING INSTALLATIONS
Owned by: FILTER ALERT CORPORATION
Serial Number: 73715707
