Respirators
CA 1104456 A · Owner: Longevity Products, Inc. · Inventors: Kritzer, Richard W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A respirator through which a person may breath air or a mixture of air and oxygen, and which vibrates the material passing through the respirator during inhalation and exhalation in such a manner as to vibrate the cilia in the lungs of the person breathing through the respirator. The respirator also embodying a manually operable member for selectively applying positive pressure to the lungs of the person using the same.
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
- Granted July 7, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 1998.
- 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.