Notebook construction
CA 1233194 A · Owner: Hsi, Peter H.Y. · Inventors: Hsi, Peter H.Y.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A notebook construction in which multiple blank pages of a small notebook are provided by folded sheets of paper eight times the nominal dimensions of the notebook pages. Selective unfolding of the folded pages provides larger pages for use where desired. Sheets of paper having an area eight times the area of the folded pages are stacked and sewn together along one-half of a center fold. The other half of the center fold is cut so that each half of the sheet may be folded twice to the completely folded page size, and the sheets are of different colors so that the two halves of a particular sheet may be selected and used. The stitching utilizes threads of different colors and, the threads …
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 February 23, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 23, 2005.
- 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.