Activity detector usable with a serial data link
CA 1186753 A · Owner: Ncr Corporation · Inventors: Duke, Jack R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, The invention relates to an activity detector device for detecting the presence or absence of information transmission over a serial data link between a computer system and a peripheral device. If a presence of a data signal exists as determined by the activity detector, the data signal is transmitted through to the computer system. If an absence of the data signal exists as determined by the activity detector, the input transmission link is decoupled from the computer system by the activity detector and places an all ones signal on the input line to the computer system consistent with the I/O protocol.
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 May 7, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 2002.
- 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.