Loop data transmission system
CA 2262395 C · Owner: Nagashima, Kizo · Inventors: Kawarada, Akira; Yamaguchi, Akihiko; Toda, Takeo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A data transmission system according to the present invention comprises transmission devices connected to a loop transmission path, wherein each of the transmission devices, if the destination address in a received frame is its own address, will get the frame and, if the source address in the received frame is its own address, will remove the frame from the transmission path.
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 23, 1999 and granted June 17, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 2021.
- 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.