Method and apparatus for fault tolerant connection of a computing system to local area networks
CA 2117619 C · Owner: Tandem Computers Incorporated · Inventors: Rowett, Kevin J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A computing system, having an input/output bus for communicating data thereon, is connected to a network by a pair of network controller devices. Each of the network controller devices, in turn, connect to a corresponding one of a pair of multi-ported network repeater elements which are in, turn, connected to one another by a pair of network links. At least one workstation is connected to each of the network repeaters. One of the network controllers is initially selected as a primary data communicating path from the computing system to the network. The network controllers periodically transmit messages to one another and if receipt, of those messages by the primary network controller is …
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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 1, 1994 and granted May 11, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 1, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 1, 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
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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.