Magnetic visual display
CA 2072964 C · Owner: Ohio Art Company (The) · Inventors: Gilano, Michael A.; Gilano, Michael; Langford, Gordon Bedford
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for providing a magnetic display in which a magnetic field (17) produce visual patterns upon exposure to the apparatus. The apparatus comprises an enclosure (50) which contains magnetically active flakes (16) held within a dispersion medium (14) which holds the magnetically active flakes in suspension yet allows alignment of the flakes along the flux lines (18) of the magnetic field when the flakes are exposed to the locus of the magnetic field.
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 October 17, 1990 and granted December 1, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 2012.
- 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.