Alarm tag
CA 2230129 C · Owner: Mw International Ltd. · 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 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. Means are provided for activating an alarm device which is mounted in said one part and comprises a resonance chamber (29) having a central outlet (30). A cover (19) is mounted on said one part (12) over said resonance chamber and comprises a , central portion in register with said outlet (30) and bars (36) extending , radially from said central portion (35) to the periphery of the cover said , bars …
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 8, 1996 and granted August 20, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 8, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 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.