LD

MAILBOXES, LETTER DROPS, LOCKS AND KEYS

INTERCOM, SECURITY, AND FIRE AND BURGLAR ALARM SYSTEMS FOR APARTMENT HOUSES, HOMES, COMMERCIAL AND INDUSTRIAL BUILDINGS AND PARTS OF ALL OF THE FOREGOING; APARTMENT HOUSE CALL AND DIRECTORY ENTRY PANELS; OPTICAL DOOR VIEWERS AND COMBINED OPTICAL DOOR VIEWERS AND MECHANICAL CHIMES; ACCESSORIES FOR INTERCOM AND SECURITY SYSTEMS-NAMELY, DESK CONSOLES, SPEAKERS, SIGNAL LIGHTS, SIGNAL SWITCHES AND SWITCH PANELS, HEADSETS AND HANDSETS, ELECTRIC SIGNS, ANNUNCIATORS, MICROPHONES, DISPLAY PANELS, AND PAGING RECEIVERS; RADIOS, TUNERS; AMPLIFIERS; PREAMPLIFIERS; TONE GENERATORS; RELAYS; TRANSFORMERS; ELECTRICAL WIRE; HORNS; MAGNETIC SWITCHES; CONDENSERS; PORTABLE ELECTRIC LINE TESTERS; ELECTRIC DOOR AND SIGNAL CHIMES AND SMOKE DETECTORS