Toy building blocks
CA 2123985 A1 · Owner: Maddock, Paul Thomas · Inventors: Maddock, Paul Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Toy building blocks are described which may be advantageously used in conjunction with POPSICLE (trademark) sticks (8) or the like, or other elongated framing pieces. One or more faces of the building block have apertures (7) defined in the surface thereof to receive the POPSICLE stick or the like. Other faces of the block may incorporate block interconnection means which may include, for example: a pin (12) parallel to an end face of one part adapted to engage a sleeve (13) parallel to an end face of another part for hinged connection; a dovetail tongue (9) parallel to one face of one part adapted to engage a dovetail groove (10) parallel to one face of another part; or a tongue (19) …
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 25, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 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.