Page-mate
CA 2047247 A1 · Owner: Napier, William Vernon · Inventors: Napier, William Vernon; Napier, Brian Daryl; Napier, Donald Blair
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for both holding written documents open and turning a predefined number of pages of said written documents, comprising of a frame with a number of longitudinal slots cut in its top surface, over the back half of the frame. A removable rigid backplane, and two moveable, transparent rigid partitions fit into the slots on each side of a written documents and are used to hold the written documents open and in place. Another longitudinal slot is cut in the top surface of the device to the front of the frame. A tubular shaft rests lengthwise within the slot. Attached to the front of the shaft is a lever protruding through a longitudinal cut into the face of the frame. This lever is used …
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 July 17, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2013.
- 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.