Magnetic recording apparatus
CA 1292309 C · Owner: Sanyo Electric Co. Ltd. · Inventors: Ino, Kazuo; Shimizu, Yoshiaki; Ishihara, Koso
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A magnetic recording apparatus of a helical scanning system comprises a rotary cylinder recording, heads and an erase head attached so as to project slightly from a rotary surface of the cylinder. The rotary erase head has a gap comprising a ferrite core half and a Sendust film formed on a ferrite core half opposed to the ferrite core half and having a larger saturation magnetic flux density. In addition, the recording heads and the rotary erase head are attached on the rotary cylinder so that an end located forward with respect to the tape travelling direction of the Sendust film may trace the rearside, with respect to the tape travelling direction apart from a distance which is a half 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 November 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 2008.
- 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.