Mobile communication device, method for mobile data communication, and program storage medium
CA 2245808 C · Owner: Hattori, Hiroyuki · Inventors: Okajima, Ichiro; Hattori, Hiroyuki; Takami, Tadao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PAD 1a of data-processing-terminal-interface 13 has a packet assembling/disassembling function for the protocol for data-link layer A and the protocol for data-link layer B. The protocol for data-link layer A45 of data processing terminal 11 prescribes that a frame in which data, transferred from the upper layer is inserted between flag sequences 31 with a prescribed bit pattern, be transmitted usually and that flag, sequences without data transmission be transmitted when there is no data requiring transmission during communication. If flag sequences 33 are transferred from data processing terminal 11 PAD 1a deletes a, part or all of flag sequences 33 and does not transfer them to wireless …
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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 December 9, 1997 and granted January 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 9, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 2019.
- 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.