Means for projecting patterns of light
CA 1331692 C · Owner: Grindon, John Russell · Inventors: Grindon, John Russell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A projector for selectively projecting patterns of light onto a remote object, one use of which is in conjunction with a system to establish measurements of the surface characteristics of the object, the projector including at least one light source and associated lens assembly mounted to project light onto the remote object, and a rotatable mask member having two or more segments, each segment a distinctive optical pattern which mask, can be rotated so as to position a selected one of the segments between the light source and the projection lens assembly whereby when light is directed through the selected segment the light projected onto the remote object will be modified by the optical …
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 August 30, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 30, 2011.
- 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.