Method and apparatus for processing data within stations of a communication network
CA 2124452 C · Owner: Fuh, Eric · Inventors: Chan, Philip Tze-Tak (Deceased); Ta, John; Tan, Min Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high speed data communication controller comprising two independent central processing units (50 and 54), each has its own program instruction fetch data path; and instruction execution data path. The data communication controller includes a dual-port serial communication subsystem (32) and a bus interface unit (40) operably associated with a four channel DMA controller (43). One central processing unit (29) is assigned the task of handling the medium access control (MAC) layer function of a multilayered local area network protocol while the other central processing , unit handles host commands (27) and buffer memory management functions associated with the transmission and reception …
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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 22, 1993 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 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
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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.