Federal Signal Corporation et al v. Advanced Pressure Systems, L.P., txsdc:4:2019cv01609

SIRENS;

PORTABLE LOUD-SPEAKER AND MICROPHONE UNITS WITH ELECTRONIC AMPLIFIERS;

ELECTRICALLY OPERATED AUDIBLE SIGNAL AND ALARM DEVICES-NAMELY, HORNS;

ELECTRICAL REVOLVING WARNING SIGNAL LIGHTS FOR USE ON EMERGENCY ROAD VEHICLES, SUCH AS POLICE CARS AND FIRE AND HIGHWAY DEPARTMENT VEHICLES;

ELECTRIC SIGNAL LIGHTS USED PRINCIPALLY FOR EMERGENCY ROAD VEHICLES, SUCH AS POLICE CARS AND FIRE AND HIGHWAY DEPARTMENT VEHICLES;