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Expired Canadian patentCanada

Process for producing magnetic head of floating type

CA 1317749 C · Owner: Ito, Kiyotaka · Inventors: Ito, Kiyotaka

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A process for producing a floating-type magnetic head comprising a head core and a slider by forming a glass layer over a core chip to cover the portion thereof to be opposed to a magnetic recording medium and there-, after fitting the core chip into a core groove in a slider chip. The core chip is fittable into the groove without the likelihood of causing damage to the medium opposed portion since this portion is covered with the glass layer. The glass layer is melted to bond the core chip to the slider chip, and the assembly is machined to form a medium opposed face to complete the magnetic head.

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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 May 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 5, 1989
GrantedMay 18, 1993
Term endedMay 18, 2010
Patent numberCA 1317749 C
Classification (IPC)G11B5/18 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJan 5, 1989Patent grantedMay 18, 1993Term endedMay 18, 2010

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.