Extensible paper fastening device
CA 1061215 A · Owner: Land, Walter H. · Inventors: Land, Walter H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Application of, WALTER ??ERY LAND, for UNITED STATES LETTERS PATENT, on, A PAPER FASTENER ABSTRACT OF THE DISCLOSURE, A quick-release paper fastener of polypropylene-ethylene copolymer for stacks of two holed sheets and comprising a tongue base member and a compressor which has resilient hooks provided with transverse V-shaped ribs on the undersurface which co-operates with a central V-shaped groove on the on the outer surface of the tongue to provide a snap-fit locking and quick release arrangeme?? and the compressor has a transverse verse bar near each slot which engages with transverse grooves and ribs or notches on the inner surface of the tongue to prevent longitudinal slipping of the …
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 August 28, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 28, 1996.
- 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.