Telephone communication headset
CA 2177039 C · Owner: Ullman, Johan · Inventors: Ullman, Johan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A telephone commu-, nication headset for attachment to the outer ear of an, operator and comprising a main unit (3) which sup-, ports an arm (2) with a microphone (1) at its outer, end, and an earphone (5) on the main unit. Further-, more, a U-shaped support (6) is arranged with a first, and a second downwardlydirected shank, said sup-, port (6) being attached to the main unit. A con-, necting upper portion (9) is arranged between the two, shanks, which portions is arranged, in a position of, use, to rest against the uppermost point of the outer, ear, where the outer ear attaches to the skull. A, weight (11) is arranged so that its mass and leverage presses the rear shank (10) of the …
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
- Filed November 22, 1993 and granted May 27, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2015.
- 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.