Integrated magnetic read/write head/flexure/conductor structure
CA 2047563 C · Owner: Hamilton, Harold J. · Inventors: Hamilton, Harold J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An integrated head/flexure/conductor structure (20) for the reading and writing of information with respect to a relatively moving medium (32) such as a disk, or drum, and a method for manufacturing the same. The proposed structure (20) takes the form of a micro-dimension, elongate dielectric flexure body (34), and, embedded within such body both magnetic read/write pole structure (22; 44 46), and, electrical coil and conductor structure (36 38, 40, 42; 56) operatively associated with the pole structure (22; 44, 46). The flexure body (4) and the embedded constituents are formed on an atom-by-atom basis utilizing one or more conventional materialdeposition processes. The method proposed by …
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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
- Filed July 22, 1991 and granted August 17, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 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
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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.