Modular photographic rangefinder camera
CA 1099977 A · Owner: Polaroid Corporation · Inventors: Johnson, Bruce K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A combined view and rangefinder for use in cameras having a variable focus objective lens includes means for establishing a primary image of the scene to be photographed framed in a generally rectangular field of view together with a secondary focusing image superposed on the primary image and movable obliquely across the primary image in correspondence with camera focusing so that substantial coincidence between the primary and secondary images is indicative of the camera assuming a focused condition with respect to the scene to be photographed. In addition, the path of movement for the movable secondary image of the combined view and rangefinder is located above the geometric center of …
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 April 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 1998.
- 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.