Method and apparatus for automatically extracting and retracting an antenna in a wireless telephone
CA 2219760 C · Owner: Lee, Han-Sang · Inventors: Lee, Han-Sang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
When an operation such as opening or closing of a front flip cover or a key operation of communication-start or communication-end occurs a controller , acquires, information for extraction or retraction of an antenna. Basing on the above information, the controller controls a motor driving by intermittently supplying motor driving signal by, which the motor can rotate clockwise or counterclockwise during a preset time necessitated for fully extracting and retracting an antenna. While motor driving, if a, blocking force applied to an antenna the controller repeatedly stops , supplying of the driving signals to the motor for a predetermined interval and then resumes supplying the, …
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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 October 31, 1997 and granted January 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 31, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 2019.
- 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.