Double lens electric shield
CA 1285976 C · Owner: 546401 Ontario Limited · Inventors: Reuber, Douglas Alvin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides an improved double lens electric face shield for use in combination with a helmet. The invention also provides for goggles having a double lens arrangement therein. In the case of both the goggles and the shield, there is imprinted, on the inner surface of one lens, an electrical circuit in a pattern of generally parallel, horizontal lines, said pattern printed with conductive ink capable of generating sufficient heat to effectively de-ice or de-fog the exterior surface of the other lens when the electrical circuit has electrical power running therethrough.
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 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2008.
- 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.