Expired Canadian patentCanada
Bi-static circularly symmetric retrodirective antenna
CA 965161 A · Owner: United States (Government Of The) Of America, As Represented By The Secr Etary Of The Navy · Inventors: Coleman, H. Paris
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 March 25, 1975. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 1992.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedMarch 25, 1975
Term endedMarch 25, 1992
Patent numberCA 965161 A
Classification (IPC)H01Q3/34
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.