Cell exchange apparatus
CA 2019739 C · Owner: Yamanaka, Hideaki · Inventors: Shikama, Toshihiro; Yamanaka, Hideaki; Oshima, Kazuyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cell exchange apparatus wherein cell input ports and cell output ports are divided into a plurality of groups and input cells are multiplexed for each group. Multiplexed cells are selected in accordance with their addresses with respect to output port groups and buffered by use of a plurality of buffers. Writing and reading of cells with respect to the buffers are controlled by a memory controller in accordance with the load on each buffer.
Read the whole patent
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 June 25, 1990 and granted September 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2012.
- 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.