Control apparatus for a call reminder in a paging system
CA 2019549 C · Owner: Ishiguro, Tetsumi · Inventors: Ishiguro, Tetsumi; Muramatsu, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A signal received in a paging receiver includes a reminding control signal, by which a call reminder is controlled to remind a user to respond to the received signal in a periodical reminding mode. The degree of an importance relating to message is conveyed from a caller to a callee by using a periodical reminding call in stead of an ordinary call.
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 June 21, 1990 and granted July 26, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 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.