Electro-optic device
CA 1330228 C · Owner: Shaw, Robert Norman · Inventors: Shaw, Robert Norman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of minimising voltage induced drift in electro-optic devices, the optical state of which is controllable by the application of an electrical potential between first and second electrodes of the device the, method comprising controlling the electrical potentials applied to the first and second electrodes such that in use the average potential difference between the first and second electrodes is substantially zero.
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 14, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 2011.
- 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.