Electric toothbrush
CA 2230191 C · Owner: Herzog, Karl · Inventors: Schwarz-Hartmann, Armin; Hilfinger, Peter; Herzog, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed to an electric toothbrush (1) which incorporates a handle (2) and a brush attachment (3). The handle (2) houses an electric motor (8). Protruding from the handle (2) is a shaft (20) that is coupled to the electric motor (8). The brush attachment (3) can be mounted on the handle (2). The brush attachment (3) supports a bristle head (26) which can be coupled to the shaft (20) and from which protrude a multiplicity of bristles (4). In the operating mode the bristle, head (26) describes a rotary movement (49) and a stroke movement (50), with the frequency of the stroke movement (50) being higher, and preferably substantially higher than the frequency, of the rotary …
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 February 11, 1997 and granted April 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2019.
- 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.