Ring binder
CA 2179529 C · Owner: Wada, Takao · Inventors: Wada, Takao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In this ring binder, a pair of opposing swing base plates 3 are connected together at two locations near the center of their longitudinal swinging edges 3a by means of a joint mechanism 6 through operative engagement between the recessed joint section 61 having a projection 63 and the extended joint section 62 having a slot 64 so that, the opposing swing base plates 3 are pivotally movable together in unison, and the swinging edges 3a are pivotally movable together toward and away from the top face 21a of the recessed section 21 in the fixed base plate 2.
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 January 26, 1996 and granted April 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 26, 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.