Signaling arrangement
CA 1286391 C · Owner: American Telephone And Telegraph Company · Inventors: Landis, Edward Warren
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, An interface unit connected to one end of a communication path is arranged to conduct a transmission test of the path before exchanging information with an interface unit connected to the other end of the path and to signal the results of the test by terminating the test when the results show an absence of transmission errors and continuing the test when the results show the presence of such errors, the test being the transmission and reception of a predefined sequence of signals.
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 July 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 2008.
- 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.