Apparatus for recording and/or reproducing information to or from a recording medium
CA 2040702 C · Owner: Yagi, Takayuki · Inventors: Hatanaka, Katsunori; Yagi, Takayuki; Miyazaki, Toshihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for inputting and/or outputting information comprises a plurality of probes arranged at positions respectively facing each of the plural blocks which carry information, means for enabling the aforesaid plurality of probes to respectively perform its tracking independently, and means for inputting and/or outputting information to or from the information carrier by the use of the aforesaid probes.
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 April 17, 1991 and granted February 3, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 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.