Servicing a software-controlled elevator
CA 1212475 A · Owner: Otis Elevator Company · Inventors: Doane, John C.; Hardenbrook, David L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A computer-controlled system such as a microprocessor-based elevator is, tested diagnostically with another microprocessor-based test device independently programmed to perform various special manually selectable test sequences by overriding elevator microprocessor control. Through a keyboard an operator can enter coded test requests and test parameters which are converted by a diagnostic microprocessor into instructions that are conveyed to the elevator microprocessor to initiate a test system operation. Resultant elevator operation is sensed by the testing device using stored test programs and results and displayed on numeric displays and lights on the diagnostic device by addressing …
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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
- Granted October 7, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 7, 2003.
- 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.