System for audibly recognizing an aurally unclassifiable signal
CA 1045718 A · Owner: General Signal Corporation · Inventors: Ditoro, Michael J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to the present invention a system for, audibly recognizing a received signal which is aurally unclassifiable because it is too short or too long in its duration and/or its frequency band is too wide or too narrow comprises a signal-, storage device such as a magnetic tape recorder/reproducer and motor means for driving the tape at one speed during recording or storage of a received signal and at a different speed for, example a lower speed, during reproduction or retrieval of the signal therefrom. The storage device has means for storing the signal therein as received and means for retrieving the signal from the storage device at a time-rate different from the storing rate, for …
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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 January 2, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 1996.
- 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.