Method and apparatus for photographing a movement
CA 1305346 C · Owner: Rahikainen, Ahti · Inventors: Rahikainen, Ahti
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method and photographic apparatus for performing motion studies on a moving subject. The moving subject is photographed through a rotating disc having at least one transparent aperture and a plurality of filter apertures covered with filter plates. Opaque regions of the disc separate the apertures from one another. Preferably, miniature spotlights are connected to moving points of the subject that are desired to be studied. Each of the spotlights projects a beam having essentially one selected wavelength to pass through the filter apertures and the filter plates. Incident background light lighting the subject, is prevented from passing through the filter apertures by virtue of the filter …
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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 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 2009.
- 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.