Passive display device
CA 1188780 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Te Velde, Ties S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Passive display device.", On the facing surfaces of a first and second supporting plate, of which at least the first supporting plate is transparent, first and second electrodes res-, pectively, are provided of which at least the first electrodes are transparent. An opaque liquid is present between the supporting plates. Third electrodes (16) which can be moved between the first and second electrodes by electrostatic forces are connected to the second supporting plate. The third electrodes (16) are formed by a display part (20) having a large number of apertures (21) of which the colour of the side facing the first supporting plate is contrasting with the colour of the liquid. A number of …
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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 11, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2002.
- 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.