Alarm tag
CA 2187947 C · Owner: Holmgren, Bertil · Inventors: Holmgren, Bertil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Alarm tag comprising two parts one, of which (12) is provided with a pin (13) attached to said one part (12) to be located on one side of a product (11) with the pin extending through the product into locking engagement with the other part (10) located on the opposite side of the product. One of these parts has means for activating an alarm device in said other part and or an external alarm device by the alarm tag being carried into or out of an external field. Furthermore, one part comprises a contact element (26) operatively related to said alarm device or a second alarm device said contact element normally being in a first position in which the alarm device is silent but being …
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 April 11, 1995 and granted July 1, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 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.