Internally illuminated sign
CA 2100862 C · Owner: Holophane Company, Inc. · Inventors: Hammond, Douglas Scott; Subisak, Gregory Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An internally illuminated sign (10) in which a luminaire (12) mounted on the border or periphery of the sign (10) uniformly illuminates the face and/or faces (18) of the sign (10) thereby eliminating any necessity for providing human access to the interior of the sign for maintenance and relamping.
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
- Filed January 28, 1992 and granted February 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2014.
- 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.