Infrared radiation sensitive image pick-up device
CA 1080336 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Auphan, Michel J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The device in accordance with the invention consists of interconnected disks of piezoelectric material, at least one disk having a ferroelectric transition temperature. A metal foil is provided between the said disks. Mutually parallel conductive strips are provided on both outer surfaces of the assembly thus formed. The direction of the strips on the one surface differs from that of the strips on the other surface. A generator for periodic signals which can be sequentially connected to each strip on one of the surfaces of the first disk generates therein, via a piezoelectric effect, ultrasonic vibrations which are intercepted by the other disk which converts these vibrations into electric …
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 June 24, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 1997.
- 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.