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Patent map and technology intelligence report. Telephonic CommunicationPublished by: Intellectual Property Exchange Published: Jan. 24, 2010 - 15 Pages Table of Contents
AbstractSubstation equipment, e.g. for use by subscribers; Automatic or semi-automatic exchanges; Manual exchanges; Interconnection arrangements between switching centers; Interconnection arrangements not involving centralized switching; Telephonic communication systems adapted for combination with other electrical systems; Party-line systems; Metering arrangements; Time-controlling arrangements; Time-indicating arrangements; Prepayment telephone systems; Current supply arrangements for telephone systems.Get Full Details About This Report >> |
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