Method of and apparatus for object or surface inspection employing multicolor reflection discrimination
CA 2089332 A1 · Owner: Bishop, Robert · Inventors: Damon, Richard; Bishop, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel automatic inspection technique and apparatus is disclosed for differentiating differently colored regions of an object or surface (such as solid state wafers printed, circuit boards, or more general applications for distinguishing regions of one color from their neighboring or surrounding areas of different color) involving the use, of at least a pair of separate detectors of light images (CCD cameras preferably) reflected from the object or surface and provided with optical filters of different colors corresponding to the differently colored regions of the object or surface; and an electronic filtering processing by multiplying the detector signals by different weighting …
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 February 11, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 11, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 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.