Information recording and/or reproducing apparatus
CA 2047801 C · Owner: Canon Kabushiki Kaisha · Inventors: Yamano, Akihiko; Nose, Hiroyasu; Miyazaki, Toshihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus and method for recording and/or reproducing information onto/from a medium through a probe electrode by using a scanning tunnel microscope comprises: a voltage applying circuit to apply a voltage between the medium and the probe electrode in which, the recording operation and/or the reproducing operation of the information onto/from the medium are/is executed by applying the voltage by the voltage applying circuit; a distance adjusting mechanism to adjust a distance between the medium and the probe electrode in a manner such that the voltage applied by the voltage applying circuit and the current flowing between the medium and the probe electrode to which the voltage has been …
Read the whole patent
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 July 24, 1991 and granted August 26, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2013.
- 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.