Burst mode transmitter/receiver unit
CA 2019266 A1 · Owner: Greenwood, Martin · Inventors: Greenwood, Martin; Greenwood, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: Burst Mode Transmitter/Receiver Unit A cordless telephone handset includes a burst mode transmitter/receiver unit comprising a radio (10) and a current sink (20) shunted across the radio. A controller (18) controls the current sink (20) in a feedback manner such that the sum of the currents drawn by the radio and the current sink is substantially constant in order to, compensate for fluctuations in the current drawn by the radio alone, so as to avoid interference at the burst rate when the handset is used in conjunction with a hearing aid.
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 June 19, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 2012.
- 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.