Rank order filter
CA 2113140 C · Owner: I-Chips Technology Incorporated · Inventors: Kohno, Masahiro; Kato, Masahiro; Nittaya, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rank order filter is disclosed in which the maximum value, the minimum value and the median value are determined in a 3 x 3 local area having three sample values in each of column and row. The three sample values in the 3 x 3 local area are rearranged in descending order of magnitude by column, and the maximum values or the minimum values in each column are compared with each other thereby to determine the maximum value or the minimum value in the 3 x 3 local area. Also after comparing the median values with each other in each column, the maximum value in the column having the minimum median value, the minimum value in the column having the maximum median value and the median value in the …
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 January 10, 1994 and granted April 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2016.
- 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.