Inspection apparatus
CA 1259390 A · Owner: Sira Limited · Inventors: West, Robert N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A beam of radiation is scanned across a sheet 13 and is either reflected therefrom or transmitted therethrough. Faults in the sheet 13 deflect scatter or alternate, the beam which is then passed to a retroreflector screen 24 where it forms an image 15. Analysis of the image 15 is carried out via the scanning means 22 to determine the faults in the sheet 13.
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
- Granted September 12, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 12, 2006.
- 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.