Zoom lens
CA 1086116 A · Owner: Hauser, Raimund · Inventors: Kantner, Otto; Von Belvard, Peter R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a zoom lens having at least two slidable lens elements, a first mechanical control means for moving the slidable lens elements in accordance with a first law such that images of different magnification of objects lying beyond a predetermined distance from the zoom lens may be focussed in an image plane and a second macro, mechanical, control means for moving the movable lens elements in accordance with a second law such that images of different magnification of an object nearer to the zoom lens than said predetermined distance may be focussed in said image plane, the lens means being selectively controllable by said first and second control means.
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
- Granted September 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 1997.
- 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.