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Expired Canadian patentCanada

Mobile receiver unit having function for providing information of electric field intensity

CA 1308783 C · Owner: Yoshihara, Seiichi · Inventors: Yoshihara, Seiichi

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

A mobile receiver unit which has a function for providing information of an electric field intensity and which is used in a mobile radio telephone system includes a level detector for outputting a level detection signal corresponding to an electric field intensity and an, information producing unit for signalling to a user information of a geographic gradient of the electric field intensity on the basis of an output signal from the level detector. The information producing unit includes a display and/or an acoustic device for indicating a direction of a higher electric field intensity.

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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 October 13, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 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.
FiledMarch 6, 1987
GrantedOctober 13, 1992
Term endedOctober 13, 2009
Patent numberCA 1308783 C
Classification (IPC)H04B7/26 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedMarch 6, 1987Patent grantedOct 13, 1992Term endedOct 13, 2009

Sources & verification

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