Expired Canadian patentCanada
Seismic signal transmission system using radio relays
CA 1279374 C · Owner: Institut Francais Du Petrole · Inventors: Rialan, Joseph; Deconinck, Bernard; Thierry, Gerard
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 January 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 29, 1987
GrantedJanuary 22, 1991
Term endedJanuary 22, 2008
Patent numberCA 1279374 C
Classification (IPC)G01V1/22
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.