Verification of barcodes
CA 2228526 C · Owner: Herzig, John · Inventors: Herzig, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Verification patterns (19) are associated with barcodes (1) to provide rapid visual confirmation that a barcode is printed within acceptable tolerances. A master of a barcode to be produced includes at least one verification pattern (19) including a wedge (21) formed by an unprinted area or areas bounded by a printed area or areas. During reproduction an anticipated degree of ink-, spread will cause a predetermined degree of shortening of the wedge while , abnormal degrees of shortening are an indication of press and/or pre-press errors and/or an inappropriately specified master. With a suitably dimensioned wedge, compliance with bar and space width tolerances can be assessed. Two …
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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 August 2, 1996 and granted October 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 2, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 2, 2018.
- 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.