Packet switching apparatus
CA 2105331 C · Owner: Ciena Corporation · Inventors: Ikeda, Chinatsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the packet switching apparatus of the present invention, packets are inputted, parallel-expanded by a serial-parallel converter, multiplexed on a time division multiplexer, and address information of the packets is discriminated by address filters provided corresponding to the output ports. The address filters receive packets carrying relevant addresses and transmit them to corresponding buffers for storage. The buffers monitor the number of stored packets, and according to the results of comparison of the number of stored packets and buffer capacity, send control signals to reserve memory control assemblies to effect connection and disconnection between the reserve memories and the …
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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 September 1, 1993 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 1, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 1, 2015.
- 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.