Knife sharpeners
CA 1209339 A · Owner: Wilkinson Sword Limited · Inventors: Pittaway, Alan K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to knife sharpeners and, particularly to knife sharpeners of a kind which are incorporated in a holder for the knife in which the knife is placed when not in use. In such holders the blade sharpener is located so that the action of positioning the knife in the holder and/or the action of withdrawing the knife from the holder moves the cutting edge relative to the sharpening device to effect a sharpening action. The knife sharpener of the present invention is provided with means which are incorporated in the holder for varying the effectiveness of the sharpening device even to the extent of rendering it inoperative.
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 12, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 12, 2003.
- 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.