Display member
CA 1270639 C · Owner: Kent, Roger S. · Inventors: Kent, Roger S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns an improvement in a display member of the type comprising a plurality of reference members accommodated within a common chamber filled with an opaque fluid wherein each reference member is independently movable between a display position at which it is in face to face engagement with a display face of the chamber and a non-display position at which it is out of engagement with the display face. The improvement comprises each reference member being associated with a boundary wall which surrounds the sides of the reference member when at its non-display and/or display position. The function of the boundary wall is to direct fluid entering or escaping from the space …
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 June 26, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 26, 2007.
- 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.