Looped bus system for connecting plural nodes or plural circuit cards
CA 2121406 C · Owner: Takahashi, Setsuo · Inventors: Takase, Akihiko; Takahashi, Setsuo; Yanagi, Junichirou
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A looped bus system includes a plurality of nodes connected by unidirectional buses having opposite directions of signal transmission. The head of bus function for one bus is located on a node different from that for the head of bus function for the other bus the, head of bus function is located on the same node as the termination of bus function for the other bus and the, head of bus function is located on the same node as the termination of bus function for one bus. As a result the buses can be reconfigured and nodes can be added freely by the use of an unused bus portion present in a part of the looped bus under normal condition.
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 April 15, 1994 and granted February 17, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2016.
- 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.