Selection control and indication means
CA 2057460 C · Owner: Coin Acceptors, Inc. · Inventors: Levasseur, Joseph L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for making a selection from between a plurality of different options such as different products vended from a vending machine including a housing structure having an elongated passageway therein, a wall at one end of the passageway a device, for introducing an acoustic pulse in the passageway at the one end and senors means at the one end for responding to pulses introduced into the passageway and reflected back along the passageway, and a plurality of spaced selection members mounted on the housing each having a wall portion movable between positions extending into the passageway thereat and position not extending into the passageway. The invention may also be used in association …
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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 10, 1991 and granted January 21, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2013.
- 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.