Ink jet recording apparatus
CA 2108302 C · Owner: Izumida, Masaaki · Inventors: Izumida, Masaaki; Kamiyama, Yuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A driving voltage of a discharging heater in an ink jet recording head is set according to property of the individual recording head. More specifically sub-heaters are formed on a board on which discharging heaters are formed by a same process as that for the discharging heaters. Resistance values of the sub-heaters are read so that the driving voltage of the discharging heaters can be set on the basis of the read resistance values.
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 October 13, 1993 and granted December 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 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.