Coordination of a telephony handset session with an e-mail...

Coordination of a voicemail response with calendar scheduling

Copper based interface system and regulated power source

Copy protection of software for use in a private branch exchange

Corded to cordless telephone converter

Corded/cordless telephone

Cordless automatic answering telephone set

Cordless cellular system base station

Cordless headset telephone

Cordless headset telephone

Cordless headset telephone

Cordless headset telephone for use with a business telephone

Cordless key telephone system capable of quickly answering incom

Cordless key telephone system for covering multiple service area

Cordless key telephone system for repeating attempts to alert st

Cordless key telephone system having zone switching function

Cordless key telephone system with multiple tenant facility

Cordless loud speaking telephone

Cordless pen telephone handset

Cordless phone and cordless phone system using such cordless pho