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Canadian application, no grantCanada

Methods and apparatus for determining forward and reverse link performance in a wireless communication system

CA 2256979 A1 · Owner: Cheng, Terry Si-Fong · Inventors: Cheng, Terry Si-Fong; Gandhi, Asif Dawoodi

CIPO record

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Abstract From the Canadian patent

Link performance is measured in a code division multiple access (CDMA) personal, communication service (PCS) or cellular system or other type of wireless , system, using a test set-up which permits the simulation of various changes in system configuration. An, illustrative embodiment includes a first attenuator arranged in a common portion of a, receive path and a transmit path of a mobile station of the system and a , second attenuator, arranged in either a receive-only portion of the receive path or a transmitonly portion of, the transmit path. The amounts of attenuation provided by the first and second attenuators, are decoupled such that a different amount of attenuation can be …

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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

  • Filed December 23, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 23, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 2020.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 23, 1998
GrantedNo grant recorded
Term endedDecember 23, 2018
Patent numberCA 2256979 A1
Classification (IPC)H04B7/26 +1 more

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedDec 23, 1998Term endedDec 23, 2018

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