Communications device with movable element control interface
CA 2045176 C · Owner: Krolopp, Robert K. · Inventors: Metroka, Michael P.; Krolopp, Robert K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A portable radiotelephone with a keypad (110) alphanumeric character display (416) and hands free function (450) is disclosed. A movable flip element (104) of the housing covers a keypad (110) and other control buttons when in a closed on-hook, position and activates the illumination of the keypad (110) enables the display (416), and enables the hands free function (450) when in an open, off-hook, position. The duration of keypad (110) illumination and display (416) activation are timed to reduce battery drain and the hands free function (450) may be deactivated with a hookswitch flash.
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 November 1, 1990 and granted November 8, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 1, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 1, 2012.
- 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.