Range repeater for a transmission system
CA 2222945 C · Owner: Myer, Robert Evan · Inventors: Myer, Robert Evan; Bi, Qi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a repeater for a telecommunications transmission system such as a CDMA wireless system. The repeater reduces leakage by means of a feedback, signal whose amplitude and phase are adjusted in response to the amplitude and phase of, a sampled input signal when a switch turns off the normal output of the repeater for a, short period of time. In one embodiment a pilot signal is transmitted during , this time period so that the sampled input is the leakage signal. In another embodiment the, sampled input is the normal transmission signal received during the time period.
Read the whole patent
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 November 28, 1997 and granted January 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 28, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.