Sweeper device
CA 2193044 C · Owner: Ishikawa, Hiroki · Inventors: Ishikawa, Hiroki; Murakami, Masaki; Kenmochi, Yasuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sweeper device including a head, a stick mounted on an upper surface of the head and a sweeping sheet detachably attached to the head, a pair of clamping members being provided in a transversely symmetric relationship with respective inner ends thereof being opposed to each other each of the clamping members being pivotally mounted at an inner end thereof on the upper surface of the head so that the clamping member can be pivotally opened upward from the upper surface of the head.
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 December 16, 1996 and granted December 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 16, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 2018.
- 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.