Method and device for controlling radiation
CA 1057863 A · Owner: Wilhelm, George M. · Inventors: Wilhelm, George M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and device for controlling radiation from a television receiving apparatus and controlling the production of electrostatic units the device comprising a first and second transparent plate juxtaposed against each other and between the plates a thin transparent mineral oil film. The device is further comprised of a means for sealing the mineral oil between the plates and a means for attaching the lens device to the viewing surface of the television receiving apparatus.
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 3, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 3, 1996.
- 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.