Security thread detector assembly
CA 2201306 C · Owner: Webb, Martin John · Inventors: Webb, Martin John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A security thread detector assembly for reading a security thread (1) carried by a security document and coded such that each of a succession of segments along the thread represents a digital value the , particular digital value being represented by the particular characteristic of the respective segment comprises a head (3) having a multiplicity of parallel reading channels (8) having a track pitch which is substantially less than the length of a segment and being disposed to read the document such that the thread (1) is substantially broadside to the channels, whereby all the segments are sensed substantially simultaneously and each segment is represented by a plurality of samples.
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 November 7, 1995 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 7, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 2017.
- 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.