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02128 Feb 199023 Jun 1992Lebowitz Mayer MCellular network data transmission systemUS51270411 Jun 199030 Jun 1992Spectrum Information Technologies, Inc.System and method for interfacing computers to diverse telephone networksUS513629130 Nov 19904 Aug 1992Unisys CorporationTransmitting binary data files using electronic mailUS515766021 Sep 199020 Oct 1992Hitachi, Ltd.Communication system including p
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