Unshielded horizontal magnetoresistive head and method of fabricating same
CA 2095035 C · Owner: Guzman, Javier I. · Inventors: Jones, Robert E. Jr.; Mountfield, Keith R.; Kryder, Mark H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An unshielded horizontal magnetoresistive head (1) for magnetic sensing and reading devices. The horizontal unshielded magnetoresistive head (1) is comprised of two magnetoresistive elements (2) separated by a gap (10) and a, conductive cross member (3) which electrically connects the magnetoresistive elements (2) together and to a common electrical point such as system ground (4). A differential voltage sensing circuit (35) is connected across the magnetoresistive elements (2) for sensing voltage variations when magnetic data is sensed by the head (1). The present invention further facilitates a more simplified fabrication process which results in cost savings and more efficient …
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 22, 1991 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 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
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.