Mat product communication system
CA 2430388 A1 · Owner: Tsuei, Alexander C. · Inventors: Tsuei, Alexander C.; Mitra, Smarajit; Sinclair, James W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of communicating information is provided wherein the method includes , providing a base mat adapted for receiving at least one replaceable sheet where the base mat has first and second opposing surfaces. The method further includes providing a first replaceable sheet having a base surface and an opposing face surface, wherein the face surface displays indicia. The first replaceable sheet is removably attached to at least a portion of the first surface of the base mat so that the base surface of the sheet faces the first surface of the base mat, where it is displayed for a period of time. When it is desired to change the indicia, the first replaceable sheet is removed and , a …
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 16, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2023.
- 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.