Secondary surveillance radar
CA 1138077 A · Owner: Marconi Company Limited (The) · Inventors: Cole, Henry W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improvements in or relating to secondary surveillance radar A secondary surveillance radar is provided with means for reducing the effect of undesirable reflections on the interrogation pulses transmitted by the radar and the replies received in response to the interrogations. In addition to a directional antenna a further omni-directional antenna is provided and the energy of certain of the interrogation pulses are shared between the two antennas in such a manner as to enhance suppression of replies from aircraft which are located at angles away from the boresight of the directional antenna.
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
- Granted December 21, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 1999.
- 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.