Magnetic domain device
CA 1111554 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: De Jonge, Frederik A.; Verhulst, Antonius G.H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A magnetic device comprising at least one thin layer of a magnetizable material which has an easy axis of magnetization approximately normal to the surface of the layer. Magnetic domains are propagated in the layer and these are detected. Propagation occurs by means suitable for that purpose in co-operation with a pattern of magnetizable material with which the layer is provided. Detection occurs by means suitable for that purpose in co-operation with a pattern of magneto-resistive material with which the layer is provided. At least in the part of the device where the detection occurs the patterns, have substantially the same configuration and one pattern is situated between the layer of …
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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 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 1998.
- 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.