Toroidal coupled telemetry apparatus
CA 1191554 A · Owner: Tele-Drill, Inc. · Inventors: Smith, Harrison C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a downhole toroidal coupled telemetry apparatus including at least one annular core member a plurality, of primary windings (126) and a secondary winding (150) comprising a conductive strap of one and one-half turns around the core member and one-half turn provided by an outer portion of the drill collar (38).
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 August 6, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 2002.
- 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.