Elevator system
CA 1107415 A · Owner: Westinghouse Electric Corporation · Inventors: Otto, Paul R.; Leang, William N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
46,844, ELEVATOR SYSTEM, ABSTRACT OF THE DISCLOSURE An elevator system including an elevator car mounted in a building to serve the floors therein. A car call station in the elevator car includes a plurality of car call pushbuttons and associated lamps. Each pushbutton requires only a single set of contacts and a single conductor to register a car call, drive the associated lamp and to, provide a "button actuated" signal each time the pushbutton is actuated.
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 August 18, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 1998.
- 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.