Liquid crystal display element
CA 1136843 A · Owner: Tokyo Shibaura Denki Kabushiki Kaisha · Inventors: Tomii, Hitoshi; Wada, Yuusuke; Matsumoto, Shoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid crystal display element utilizing dynamic scattering effect uses a liquid crystal material which is a mixture of at least one kind of liquid crystal having a relatively small birefringence and at least one kind of liquid crystal having a relatively great birefringence, and which has a birefringence of 0.14 to 0.21 when measured with light of 589 nm wavelength at 20°C.
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 December 7, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 1999.
- 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.