Stamps
CA 2080819 A1 · Owner: Australian Postal Corporation Trading As Australia Post · Inventors: Smith, H.; Gray, Robert; Power, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved stamp is disclosed which has the appearance of a conventional perforated edge stamp. The stamp has simulated edge perforations (1) produced by cutting a series of concave portions (5) and series of convex portions (7). The concave portions (5) smoothly terminate with the concave portions (7). The stamps can be produced on an elongate web (3) and be carried on a backing web (17) by a peel and stick adhesive (9). By cutting the simulated perforations (1) with the smoothly terminating concave convex, portions (5, 7) it is possible to strip unwanted skeleton material on which the stamp is printed from the backing web (17) thereby, leaving the stamps in spaced apart separate …
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 13, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 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.