Defogging eye glasses
CA 1104851 A · Owner: Mccooeye, Donald E. · Inventors: Mccooeye, Donald E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A defogging system for eye glasses comprising an electrical circuit means associated with the frame of the eye glasses. A first electrical contact is positioned on one side of each of the rims thereof so as to be in contact with the lens when in position in the rim, and a corresponding second electrical contact,not contacting the first is located on the opposite side of each rim so as to be in contact with the lens when in position in the rim. An electrical circuit means is provided to carry current from a power source positioned in the frame to the first electrical contacts in the rims and from the second electrical contacts in the rims back to the power source. Appropriate on-off switch …
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 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 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.