Head-borne binocular indirect ophthalmoscope with integrated telescope
CA 1257495 A · Owner: Volk, Myron, Co-Executor Of The Estate Of David Volk (Deceased) · Inventors: Volk, David (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is presented an improved head-borne binocular indirect ophthalmoscope for viewing the aerial image of the fundus of the eye, having the unique feature that it incorporates within each of its two observing portions a two-lens telescope of low magnifying power which magnifies said aerial image of the fundus. The telescope incorporated into the ophthalmoscope differs from the usual coaxial type in that the optical axis of the high powered objective lens and that of the high powered ocular lens of said telescope are caused to intersecteach other at an angle of about 94° at the surface of a laterally positioned oblique front surface mirror, said lenses and said mirror being in a fixed …
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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 July 18, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 18, 2006.
- 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.