Acupressure patch and method of use
CA 2201667 C · Owner: Chang, Henry H. · Inventors: Chang, Henry H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An acupressure patch for providing a controlled pressure to a selected point on the skin of a patient for a selected period of time is disclosed. The patch includes a rigid nub fixedly mounted to a flat rigid pressure plate. The pressure plate is positioned on an adhesive disc and held in place by an adhesive ring. The nub sits in an aperture such that it is not covered with any adhesive. A cushioning pad may also be provided between the pressure plate and the adhesive disc. The acupressure patch provides a low profile apparatus which can be secured to a patient's skin to provide adequate pressure to be effective but not to irritate the skin.
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 3, 1997 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2019.
- 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.