Camera with detachable electronic flash unit and exposure control system therefor
CA 1053052 A · Owner: Polaroid Corporation · Inventors: Kee, Richard C.; Land, Edwin H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A camera with a detachable electronic flash unit. The camera includes apparatus effective when the flash unit is detached for making an automatically controlled exposure under ambient light conditions. When the flash unit is attached, the ambient exposure control system is disabled and operation of the camera is inhibited until charging of the flash unit is initiated by pressing a button. When the flash unit is charged. the camera is enabled to make a flash exposure by triggering the flash unit during an, interval of time in which the light output of the electronic flash unit is regulated so that a uniform flash of light will be produced when the shutter is actuated.
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 24, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 24, 1996.
- 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.