Joystick
CA 2201759 C · Owner: Leica Inc. · Inventors: Zelvin, Joseph L.; Luce, David A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The disclosure relates to a joystick (24) for positioning a test axis of an ophthalmic instrument relative to an eye of a patient. In a preferred embodiment, the joystick (24) includes an actuator (30) extending therefrom and arranged to alternately engage a pair of motor control switches (28a and 28b) incident to slight rotation of the joystick handle (31) in opposite directions, thereby activating a motor drive to raise and lower the test axis.
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 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.