Speech response interface circuit
CA 1238734 A · Owner: American Telephone And Telegraph Company · Inventors: Rose, Richard C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, There is disclosed a speech interface circuit for use with a communication bus to interface telephone users with a computer which is also connected to the communication bus. The circuit operates to accept digital input signals over the bus from the communication processor as well as from the user and to translate these signals for the benefit of the computer. Under control of computer instructions interpreted from the translated signals the, interface transmits selected prestored speech messages to calling users.
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 June 28, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 28, 2005.
- 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.