Method, apparatus and system for verification of patterns
CA 2249265 C · Owner: Focus Automation Systems Inc. · Inventors: Pearson, Eric Clifford; Burjoski, Joseph Daniel; Mccloy, Bradley John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method, apparatus and system for verifying the establishment of a pattern includes means for storing a template of the pattern means for acquiring an , image of the established pattern a first image processing means to alter at least one of said template and acquired images to produce at least two resultant images, comparison means to compare the two resultant images with the other of said template and acquired image and means to evaluate the results of each comparison to determine if the established pattern includes a defect. Both gray scale and binary processing and comparisons are disclosed for use as required.
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 March 25, 1997 and granted December 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2019.
- 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.