AIR-DEFENSE

Air brake filters for vehicles; filters for vehicle air brake lines; air brake filter systems for vehicles, namely, air line connectors and replaceable filter cartridges; cartridges for air brake line filter systems for vehicles; air brake filter system with status indicators for vehicles, namely, air line connectors and replaceable filter cartridges; vehicle air line filters with replaceable cartridges and status indicators; replaceable cartridge air line filter systems with status indicator for commercial vehicles, namely, air line connectors and replaceable filter cartridges