Communication control method and apparatus, and communication system
CA 2246830 C · Owner: Shimura, Akihiro · Inventors: Isoda, Takashi; Shimura, Akihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A printer has a queue for queuing a queued execution command, an immediate execution agent for executing a write command, and a queued execution agent for executing a read command. The immediate execution agent immediately executes the received write command and writes data in a host. The queued execution agent picks up a read command from the queue and reads out, data from the host. The host appends a data transfer request from the printer to a queue, issues a write command to the printer on the basis of that data transfer request, and issues a read command to the printer on the basis of a print data transmission request or the like from an application. Independent full-duplex channels can …
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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 8, 1998 and granted July 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.