SOCIETA ITALIANA TELECOMUNICAZIONI SIEMENS S.P.A.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4893309 Digital interface between at least two subscriber line interface circuits and a processing unitExpiredJan 25, 88Jan 09, 90[H04J]
4881226 Digital interface of an integrated subscriber line interface circuitExpiredJan 25, 88Nov 14, 89[H04J]
4355288 Frequency-stabilizing system for generator of microwave oscillationsExpiredApr 22, 80Oct 19, 82[H03L]
4322850 Sampling system for decoding biphase-coded data messagesExpiredApr 16, 80Mar 30, 82[H03D]
4313198 Synchronous demultiplexer with elastic bit store for TDM/PCM telecommunication systemExpiredOct 17, 79Jan 26, 82[H04J]

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