Magnetic devices
CA 1291244 C · Owner: Chambers, Steven Henry · Inventors: Pettigrew, Robert Martin; Davies, Dafydd Geraint; Chambers, Steven Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Magnetic devices are disclosed which include an article comprising a substrate and a thin coating of a magnetic material, characterised in that: (a) said substrate is a flexible, laminar material; (b) said magnetic material is an amorphous metal glass of high intrinsic magnetic permeability with, low or substantially zero magnetostriction and with low, coercivity; and (c) said thin coating of a magnetic material is not greater than 6 microns in thickness. This article can be used as or to make, an antipilferage, tag or marker. Deactivation materials and configurations are also disclosed, as well as techniques in particular, sputtering, for producing such a tag.
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
- Granted October 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 2008.
- 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.