Appliance model identification encoding
CA 2082789 A1 · Owner: General Electric Company · Inventors: Head, Jesse Spalding
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A microprocesser-based controller for an appliance such as a microwave oven is able to control a number of different models having different cooking characteristics. The user-operable keypanel is unique to each model and a scanned, matrix keyboard on the keypanel is encoded in a manner consistent with conventional scanned matrix keyboard techniques to identify to the controller the particular model. A scanned matrix keyboard includes a set of drive lines and set of sense lines intersecting the drive lines. In one embodiment disclosed herein, one or more sense lines are added that are uniquely connected to the existing drive lines depending on the particular model being encoded. The added …
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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 November 12, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2014.
- 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.