Bus control system
CA 2036066 C · Owner: Igi, Yoso · Inventors: Kawasaki, Keiko; Sumitani, Kazuo; Fujisono, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bus control system for controlling intermultiprocessor communication by polling comprising a, listener response signal line for transferring an end answer signal from a listener circuit to a talker circuit immediately when the transfer of data between the talker and the listener is finished without, waiting for the completion of data transfer within the receiving processor, whereby the bus occupation period is shortened.
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 February 11, 1991 and granted August 20, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2013.
- 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.