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Expired Canadian patentCanada

Method of and apparatus for acknowledging and answering a paging signal

CA 1313899 C · Owner: Davis, Walter Lee · Inventors: Davis, Walter Lee

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A paging system with a remote pager which includes a transmitter with a plurality of individually selectable encoded acknowledge signals. The system includes apparatus at the paging terminal for composing messages with a primary message and a plurality of alternate responses each response, corresponding to one of the acknowledge signals. Upon reception of the page, the pager is operated by selecting the acknowledge signal corresponding with the desired response to the primary message. Transmission of the selected acknowledge signal acknowledges reception of the page and simultaneously, answers the primary message.

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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 February 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 23, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 9, 1989
GrantedFebruary 23, 1993
Term endedFebruary 23, 2010
Patent numberCA 1313899 C
Classification (IPC)G06F7/04 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJune 9, 1989Patent grantedFeb 23, 1993Term endedFeb 23, 2010

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.