Group control for lifts with immediate allocation of target calls
CA 2005026 C · Owner: Schroder, Joris · Inventors: Schroder, Joris
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In this group control, also such target calls can be allocated immediately, which were entered at a storey lying behind the cage (2) in direction of travel and the target storeys of which lie ahead of the cage (2) in direction of travel. For this purpose the call store (RAM 1), consists of a first store (RAM 1.1) for the calls of like direction entered ahead of the cage (2) in direction of travel a second store (RAM 1.2) for, the calls of opposite direction and a third store (RAM 1.3) for the calls of like direction entered behind the cage (2) in direction of travel. A control circuit (14) is activated each time on entry of a call in such a manner that a call of the same direction is …
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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 December 8, 1989 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 8, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 2011.
- 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.