Sliding-type magnetic head for magnetooptical recording
CA 2093579 C · Owner: Nishii, Tadao · Inventors: Tanaka, Hideo; Nishii, Tadao; Takeshi, Michiaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A magnetic head for magnetooptically recording information on a magnetooptical recording medium in sliding contact therewith has a head body having a sliding sole for sliding contact with a magnetooptical recording medium a, leaf spring, the head body being supported by the leaf spring, and a support member, the leaf spring having an end fixed to the support member. The leaf spring comprises a first spring system joined to the support member a second, spring system extending from the first spring system and a, third spring system extending from a distal end of the secand spring system toward the support member the head body, being supported by the third spring system. The support member has …
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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 April 7, 1993 and granted November 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 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.