Devices for testing torsional alignment between a diagnostic device and a laser refractive system
CA 2543855 C · Owner: Campbell, Charles E. · Inventors: Campbell, Charles E.; Chernyak, Dimitri
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Test devices and kits for testing an alignment measurement between a diagnostic device and a , laser refractive system are disclosed. One such test device includes a body including a proximal , portion and a distal portion. The proximal portion defines a corneal surface and an iris, and the , distal portion defines a retinal surface. The iris surface comprises one or more texture patches , for facilitating measurement of a cyclotorsional rotation of the test device. The retinal surface , defines a diffuse surface configured to absorb light. Another such device includes a body, and , means for providing optical torsion alignment markers. The device further includes means for , …
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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 November 9, 2004 and granted February 10, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.