Stud finder with level indicator
CA 2106085 C · Owner: Dufour, Jean-Guy · Inventors: Dufour, Jean-Guy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stud finder (10) includes a magnetic subassembly for detecting the presence of a ferrous metal object such as the head of a, nail or screw, in a wall with the magnetic subassembly being, mounted at one end of a base member (14). A level vial (18) is mounted at the other end of the base member and a slot is formed, in the base member between the magnetic subassembly and the level vial. When the base member is placed against a wall (12) and the presence of a stud is detected by the magnetic subassembly the, base member is moved to a position in which the level vial indicates level. The slot (66) has its longitudinal axis oriented perpendicular to the longitudinal axis of the level vial (18) …
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 March 4, 1992 and granted January 20, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2014.
- 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.