Construction toy
CA 2136357 A1 · Owner: Chiu, Tin Shing · Inventors: Chiu, Tin Shing
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A construction toy comprises generally spherical construction members having threaded openings provided thereon and rod members having extensible and contractible screw members provided at each end thereof. Five threaded openings are disposed at both the upper and lower hemispheres of the spherical member. One of the five threaded openings is disposed along the axis of rotation whereas the other four at an angle of 45° from the axis of rotation. Four to eight threaded openings are disposed along the equator of the spherical member. Each end of the rod member has an extensible and contractible screw and a screw fastening device. A variety of patterns, models, and objects can be constructed …
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 November 22, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2016.
- 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.