Voice band signal cell assembly apparatus for atm
CA 2196126 C · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Tamura, Kazunori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A discriminating section determines whether a voice band signal is "voice" or "data". When the voice band signal is voice, a voice detector detects the presence or absence of voice in the signal. If silence is detected a cell assembly, section prohibits transmission of cells. In the meantime when the voice band signal is data, a carrier detector detects the presence or absence of a carrier. A cell assembly section sends out a cell in response to the presence of the carrier in the input signal, while prohibiting the cell transmission when no carrier is detected in the input signal. The apparatus reduces the number of cells transmitted and achieves a high transmission efficiency.
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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 28, 1997 and granted November 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.