Liquid crystal display device
CA 2094522 A1 · Owner: Koseki, Toshihiko · Inventors: Takano, Hideo; Yamanaka, Hidemine; Koseki, Toshihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid crystal display device includes a first transparent insulating substrate having a common electrode. A second transparent insulating substrate has gate lines formed in one direction and intersecting data lines in the other direction. Liquid crystal display cells are formed at each cross-point of the gate and data lines and include thin film transistors and display electrodes; a light shielding layer includes an aperture for exposing a display area of each display electrode and liquid crystal material retained between the first and second substrates. The device is characterized in that the light shielding layer of edge of the aperture located at the upper stream of a rubbing …
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
- Filed April 21, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 21, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2015.
- 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.