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Expired Canadian patentCanada

Military radar - or radio communications transmission system

CA 1203576 A · Owner: Siemens Aktiengesellschaft · Inventors: Gammel, Josef

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

This invention relates to a military radar- or radio communications system, in particular with mobile transmitting and receiving equipment, permitting a continuous change of a plurality of operating frequencies in accordance with a method of sudden frequency changes. In the periods when the transmitter is not required for the transmission of information signals, such as intervals in communication the trans-, mitter is used for jamming on those frequencies or frequency sub-bands which are not required for the transmission of information signals at that time.

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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, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 22, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 12, 1978
GrantedApril 22, 1986
Term endedApril 22, 2003
Patent numberCA 1203576 A
Classification (IPC)H04K1/04 +2 more

Timeline

Timeline From CIPO dates

197919821985198819911994199720002003Application filedJuly 12, 1978Patent grantedApril 22, 1986Term endedApril 22, 2003

Sources & verification

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