Time-division multiplex communication transmission apparatus
CA 2114193 A1 · Owner: Nec Corporation · Inventors: Shimizu, Hiroyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A time-division multiplex communication transmission apparatus includes a logic processing circuit, a digital filter, a modulation circuit and a, high-frequency amplification unit. The logic processing circuit performs logic processing of input burst data and outputs a burst timing signal for each time slot for time-division transmission. The digital filter converts output data from the logic processing circuit into baseband data for modulation. The digital filter is reset at a time slot boundary when no burst data signal is present in an adjacent time slot. The modulation circuit modulates an output signal from the digital filter. The high-frequency amplification unit performs burst …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 25, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 25, 2016.
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Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.