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Expired Canadian patentCanada

Simulated communications system

CA 1076235 A · Owner: Singer Company (The) · Inventors: Eisenberg, Robert M.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

This invention is drawn to a system which simulates a communications system among a plurality of independent vehicles. The simulated system utilizes pulse width modulation to reduce noise and eliminate cross-talk. In addition the simulated con-, munications system includes a network having computer-controlled switches which automatically determine which is simulated vehicles are sufficiently close to be in communication range with each other and which are not. Thus this disclosure des-, cribes a system which is maintained under digital control and which utilizes pulse modulation to carry the actual transmission of intelligence.

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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 April 22, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 22, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedApril 22, 1980
Term endedApril 22, 1997
Patent numberCA 1076235 A
Classification (IPC)H04Q11/04 +1 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedApril 22, 1980Term endedApril 22, 1997

Sources & verification

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