Method of producing synchronising marks on film for continuous projection
CA 1101720 A · Owner: Vireco A.G. · Inventors: Mcnally, Gordon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The specification describes a cinematograph film and a method of exposing the film for continuous motion projection. .The method consists of exposing a track of film frames to make a cinematograph record on the film, and exposing a track of optical synchronising marks parallel to the film frame track. Each synchronising mark corresponds to a pertinent respective film frame and is exposed in the same operation as the pertinent film frame.
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 May 26, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 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.