Method and device for measuring retinal response
CA 1324417 C · Owner: Feldman, Barbara M. · Inventors: Richardson, Robert W.; Feldman, Barbara M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A device for detecting localized retinal damage derives focal responses of the retina(5) from the global response of the retina to patterned stimuli(9) in one's visual field. The stimuli(9) comprises a series of patterns which spatially vary according to a function of a family of orthogonal functions. Each pattern also varies temporally either by being flashed before the patient or by being reversed in contrast at a fixed frequency. An electroretinogram (ERG) or magnetoretinogram (MRG) response(13) of the patient's eye(5) to the series of patterns is fed back into a computer(7) generating the patterns. The responses are used by the computer(7) to determine the …
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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
- Granted November 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 2010.
- 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
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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.