Extension cords for plug-in telephones
CA 1056475 A · Owner: Cogan, Frederick T. · Inventors: Cogan, Frederick T.; Gumb, Beverley W.; Kuhfus, Gerd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extension cord for plug-in telephones comprises a line cord having a plug at one end for insertion in a telephone outlet and multi-outlet member on the other end. The multi-outlet member is in the form of a hollow boxlike member in the front of which are at least two apertures with a jack aligned with and behind each aperture for insertion of a plug. A back cover is attached to the multi-outlet member and the line cord enters through a slot in the cover. The jacks are wired in parallel to the line cord. A latch can be provided on the plug of the line cord and the aperture can be profiled to provide latch engaging formations. - 1 -
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 June 12, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 1996.
- 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.