Method and apparatus for automatically desensitizing sensor elements
CA 2175804 C · Owner: Knogo North America Inc. · Inventors: Pang, Dexing; Zhou, Peter Y.; Paul, Christopher Reinard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A desensitizer apparatus (10) for desensitizing a security sensor in a book spine. The apparatus includes a scanner (12) which scans along a surface against which book spines are positioned and which detects sensor elements (28) in the spines to be sure that only one book is positioned against the surface If only one sensor element is detected a signal is, generated which operates a drive mechanism to move desensitizer magnets close to the surface to deactivate the sensor element in the book.
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 October 28, 1994 and granted February 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2016.
- 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.