Adjustable depth safety cutter
CA 2299360 A1 · Owner: Davis, Raymond E. · Inventors: Davis, Raymond E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved carton cutter (10) has an incrementally extendable fully retractable first cutting blade (26) with a depressible safety guard (76) at its front end (14). A strap cutting second blade (26) is fixed at a hooked rear end (106) of the cutter (10). A ratchet mechanism (54) provides audible evidence of the amount of blade extension and a pointer (66) shows a position of the front blade (26). The front blade (26) is mounted on a lockable slide (20). Both blades (26) are easily removable without disassembly and precisely positioned without noticeable play.
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 July 31, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 31, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2020.
- 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.