System and method for detection of an accessory device connected to a portable computer
CA 2367770 A1 · Owner: Canova, Francis J. Jr. · Inventors: Osborn, Neal A.; Lemke, Steven C.; Johnson, Scott R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Embodiments of this invention provide for detecting a type of an accessory device connected to a portable computer. The portable computer may detect a signal from the accessory device and determine the type of accessory device using the signal. Once the type of accessory is identified the portable , computer may implement a software that matches the particular type of accessory. The type of accessory may be identified by measuring a voltage of a signal line that is coupled to the accessory device. The value of the voltage on the signal line may then be matched to a corresponding accessory type using a memory of the portable computer.
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 4, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 4, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2022.
- 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.