Tubular knife
CA 1137408 A · Owner: Pitney-Bowes, Inc. · Inventors: Jurkowski, Walter J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A tubular knife comprising a stationary inner, cylindrical member having a slot extending substantially longitudinally thereof, the slot having a longitudinally extending upper edge and a longitudinally extending lower cutting edge, a rotatable, outer tube concentric and substantially contiguous with the inner member the outer, tube having a slot substantially co-extensive with the slot of the inner member, the outer tube slot having an upper cutting edge inclined at a slight angle with respect to the lower cutting edge of the inner member slot means for, biasing the outer tube to a position wherein the slot of the outer tube is substantially aligned with the slot …
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 December 14, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 1999.
- 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.