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Expired Canadian patentCanada

Radio communications system eith randomly scattered, automatically organizable relay stations

CA 1237780 A · Owner: United States, (Government Of The) As Represented By The Secretary Of Th E Army · Inventors: Maass, Joachim A.

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 fully distributed disposable, self-organizing, independently powered communications system capable of providing, a radio-communications channel in environments that may prove dangerous or inaccessible to humans and that may be hostile to communications systems, comprises a number of randomly scattered self-contained relay transceiver stations which automatically organize themselves to form a relay chain capable of transporting radio messages between two user terminal stations as long as the distance between the user stations is bridged by the relay stations in line-of-sight proximity with each other.

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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 June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2005.
  • 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 25, 1985
GrantedJune 7, 1988
Term endedJune 7, 2005
Patent numberCA 1237780 A
Classification (IPC)H04B7/15

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedJune 25, 1985Patent grantedJune 7, 1988Term endedJune 7, 2005

Sources & verification

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