Tracking controlling apparatus
CA 1210147 A · Owner: Sony Corporation · Inventors: Takahashi, Takao; Yasuda, Yukihiro; Yoshioka, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an apparatus for controlling a tracking position of magnetic head which reproduces parallel tracks subsequently formed on magnetic tape, the parallel tracks containing a video signal and a pilot signal having mutually different frequencies changing in cyclic sequence from track to track a pair of control signals are generated in response to amplitudes of the reproduced pilot signal said pair of, control signals being indicative of opposite displacements of the head from the track to be traced and a tracking, error signal is formed by mixture of the pair of control circuits to control the tracking position in response to said tracking error signal. In accordance with this invention, …
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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 August 19, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 2003.
- 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.