Joystick override control
CA 2201761 C · Owner: Leica Inc. · Inventors: Miller, Donald E.; Luce, David A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An alignment override control for effecting automatic vertical alignment of a test axis of an ophthalmic instrument (10) with the center of an eye is disclosed. The test axis is associated with optical alignment means of the instrument vertically movable by an elevation motor controlled by a motor drive. A joystick (24) and a pair of directional switches (28a 28b) are , connected to the motor drive for manual positioning of the test axis. When the eye comes within a field of view defined by the optical means the override , control disconnects the switches and automatically signals the elevation motor to effect automatic alignment using signal information originating from the optical …
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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
- Filed October 13, 1995 and granted December 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 13, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2017.
- 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.