Grip-type lockable cutter knife
CA 2274195 C · Owner: Olfa Corporation · Inventors: Okada, Shoji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a gripping type of cutter knife wherein a knife blade can be locked into both the retracted and projected positions. This cutter knife includes a locking mechanism the construction and handling of which are simple. In this cutter knife a knife blade is projected by grasping against spring force, a trigger lever projected from the grip portion of the cutter body. This cutter knife is characterized in that it has a push-type locking mechanism which is selectively held in "unlocking position" wherein the trigger lever is allowed to swing or "locking position" wherein the swing is prohibited.
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 June 9, 1999 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2021.
- 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.