Wind invertible umbrella rib linkage system
CA 2072699 A1 · Owner: Liou, Fu-Tien · Inventors: Okuda, Toshio; Liou, Fu-Tien
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 wind invertible umbrella with a topless rib linkage system. The rib linkage includes a flexor that is flexible in response to a wind gust directed against the underside of the umbrella's cover which is of sufficient force to invert the rib linkage into a nonuseful or inside out position without causing sufficient rib linkage damage to prevent reversing of the linkage back into a pre-wind gust position. The flexor also is flexible in response to a manual force applied to the rib linkage in a direction opposite to the wind gust force that is of sufficient magnitude to reverse the rib linkage from its non-useful position back into a useful umbrella position …
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 June 29, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2014.
- 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.