Portable communications receiver with separated information presentation means and improved battery saving function
CA 1291537 C · Owner: Willard, David Frank · Inventors: Macnak, Philip Paul; Willard, David Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A message receiving apparatus is described including a portable communications receiver (16) intended to be, carried by the user, which receives detects and stores, messages transmitted on a first radio frequency communication channel (14). The stored message is then subsequently transmitted over a presentation unit having a second communications channel (20) to a second receiver (22) which is intended to be carried by the user. The second receiver (22) receives, and detects the message and presents the message to the user in the form of a visual display. The message may also be stored. A system transmitting synchronization signals and coded message signals is also described. In particular, …
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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
- Granted October 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 2008.
- 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.