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Expired Canadian patentCanada

Spread spectrum multiple access communication using satellite or terrestrial repeaters

CA 1294074 C · Owner: Jacobs, Irwin M. · Inventors: Gilhousen, Klein S.; Jacobs, Irwin M.; Weaver, Lindsay A. Jr.

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

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Abstract From the Canadian patent

Abstract of the Disclosure, A multiple access spread spectrum communication system, and method for providing high capacity communications to from, or between a plurality of system users using code-division-, spread-spectrum communication signals. The communication system uses means for providing marginal isolation between user communication signals. The marginal isolation is provided by generating simultaneous multiple steerable beams; using an omni-directional antenna with polarization enhancement; using power control devices to adjust the output power for user generated communication signals either in response to their input activity level or in accordance with a minimum allowable power …

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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 January 7, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 7, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 16, 1987
GrantedJanuary 7, 1992
Term endedJanuary 7, 2009
Patent numberCA 1294074 C
Classification (IPC)H04J13/00 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedOct 16, 1987Patent grantedJan 7, 1992Term endedJan 7, 2009

Sources & verification

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