Locking system
CA 1300912 C · Owner: Engineered Security Products Corporation · Inventors: Lakso, Matthew L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An interlock system for a filing cabinet or the like preventing any two drawers from being open at one time the, system using a generally vertical line of contacting balls as a lock, and means on each drawer to rigidify the line of balls upon the opening of a single drawer and returning the, line of balls to a loose unlocked condition upon closing, the drawer.
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 May 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 2009.
- 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.