Automatic umbrella
CA 2043209 A1 · Owner: Okuda, Toshio · Inventors: Liu, Fu-Tien; Okuda, Toshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A full self-opening and partial self-closing umbrella comprising an upper rib linkage runner and a lower latch runner slidable on a collapsible centerpost. A cord passes over a pulley fixed to the centerpost's top end, one cord end being connected to the rib linkage runner and the other cord end being connected to the latch runner. The umbrella's centerpost and rib linkage self-opens in response to a centerpost spring when the rib linkage runner is released from its storage position because the latch runner is held in its storage position i.e. one end, of the cord is held in a fixed position while the rib, linkage runner is allowed to move up the centerpost during …
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 May 30, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2013.
- 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.