Microwave signal receiving apparatus
CA 2002002 A1 · Owner: Motson, Richard J. · Inventors: Motson, Richard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to isolate microwaves of a selected polarization from incident microwaves collected by means of a dish reflector (10), a ferrite polarizer (16) is positioned at the focal point of the reflector. A ferrite body (26) of the polarizer extends axially of a wave guide (18) with a convergent receiving end (28) positioned outside the wave guide at the focal point and a convergent transmitting end (30) positioned within the wave guide. The ferrite body is mounted in an end portion of the wave guide by means of a plastics dielectric bobbin (32). The bobbin encases all but the transmitting end of the ferrite body which, projects beyond the bobbin into the wave guide. A controlling coil (36) …
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 1, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 1, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 1, 2011.
- 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.