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Expired Canadian patentCanada

Image display device

CA 1308471 C · Owner: Emoto, Fumiaki · Inventors: Fujii, Eiji; Emoto, Fumiaki; Senda, Kohji

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

In an image display device comprising thin film transistors and pixel electrodes arranged in a matrix form on a substrate, a semiconductor layer forming a channel region of the thin film transistor also serves as the pixel electrode, thereby making the structure of the device simple and facilitating the fabrication of the device.

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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 October 6, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 22, 1989
GrantedOctober 6, 1992
Term endedOctober 6, 2009
Patent numberCA 1308471 C
Classification (IPC)G02F1/13 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedJune 22, 1989Patent grantedOct 6, 1992Term endedOct 6, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.