U.S. federal trademark · Serial No. 73040433 · Reg. No. 1128527
KEY TELEPHONE COMMUNICATION SYSTEMS-NAMELY, CUSTOMER PREMISES TELEPHONE SYSTEMS COMPRISED OF MULTILINE TELEPHONE SETS AND MISCELLANEOUS COMMON EQUIPMENT COMPRISING ATTENDANT CONSOLES, POWER SUPPLIES, CONNECTOR BLOCKS, MOUNTING PANELS, AND PLUG-IN UNITS, WHEREIN A COMMUNICATION PATH IS SELECTED BY THE USER BY DEPRESSING A BUTTON ON A MULTI-LINE TELEPHONE SET
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