Fully automatic, multiple operation rail maintenance apparatus
CA 2203461 C · Owner: Oak Industries, Inc. · Inventors: Straub, William D.; Johnsen, David S.; Boczkiewicz, Bruce M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for detecting targets and for positioning at least one work module over a particular target to perform a task thereon. The system includes a movable machine having a main frame, a drive mechanism for propelling the machine across a base surface, a sensor associated with the machine for detecting locations of at least one target positioned on said base surface and an encoder assembly associated with the machine for obtaining motion data. The motion data includes at least one of the displacement and velocity of the machine across the base surface. Also included is a control unit for receiving the target locations from the sensor for receiving the motion, data from the encoder …
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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 April 23, 1997 and granted July 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2019.
- 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.