Multi-track magnetic signal reproducing apparatus
CA 2108639 C · Owner: Sharp Kabushiki Kaisha · Inventors: Yamada, Eiji; Takeuchi, Hitoshi; Yamawaki, Chiaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a multi-track magnetic signal reproducing apparatus a plurality of, MR heads including MR (Magneto-Resistance Effect) elements are provided corresponding to tracks on a magnetic tape. At the time of reproduction constant, current from a constant-current power supply is sequentially supplied as a pulse-, shaped current for detecting a signal to each MR element by switching a switch in response to a prescribed clock signal. An output voltage from each MR element related to reproduction of a magnetic signal on a corresponding track is sequentially, provided to one input side of a differential amplifier. In the differential amplifier the, offset voltage of each MR element provided to the …
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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 October 18, 1993 and granted May 13, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2015.
- 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.