Borehole measuring apparatus
CA 1211156 A · Owner: Prakla-Seismos G.M.B.H. · Inventors: Sender, Friedhelm
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna arrangement for use in a bore hole to receive radar signals and produce electrical signals from which the incidence direction of the radar signals can be determined includes a cross coil arrangement with two coils having elongated sides mounted adjacent the outer surface of a cylindrical insulative probe body. In one embodiment, one cross coil assembly is used in conjunction with an omnidirectional antenna and an evaluation circuit. In another embodiment two axially aligned cross coil assemblies are connected to also be usable as an omnidirectional 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 September 9, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 9, 2003.
- 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.