Single core display device
CA 1307665 C · Owner: Dayco Products Canada Inc. · Inventors: Browne, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electromagnetic display device has a rotor rotatable between limiting positions in said limiting positions to display contrasting faces in the viewing direction. The drive for the rotor uses a permanent magnet mounted on the rotor eccentrically of the rotary axis and a stator core mounted behind the rotor and on the line including the rotor axis and the viewing direction.
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 September 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 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.