Therapeutic pad device for providing negative magnetic field
CA 2084610 C · Owner: Bonlie, Dean R. · Inventors: Bonlie, Dean R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Magnetic sleeping pad (10) having a first foam lawyer (14) supporting magnets (12) and including a second spacer foam layer (18 20) above the first layer, the magnets (12) being disposed so that the negative field thereof is radiated upwardly; the arrangement and pattern of magnets (12) being such as to minimize the height of the positive magnetic fields from said magnets; said spacer foam layer supporting the lowermost contours of the pad user's body above the positive magnetic fields.
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 December 4, 1992 and granted June 30, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2014.
- 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.