Pulse toggle monitor circuit
CA 1180397 A · Owner: Gte Automatic Electric Incorporated · Inventors: Rinaldi, Gerald M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pulse toggle monitor circuit which detects the duration of toggling of a monitored pulse. A plurality of detection circuits are connected in a shift register manner. This arrangement provides for detection of pulse dialing of a duration longer than a predetermined time as defined by the period of an external reference signal and the number of detection circuits. The output of the shift register is connected to a storage circuit which is clocked by the reference signal and operates to store failure signals from the shift register. The storage circuit can be cleared either by external control or detection of a valid pulse.
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 January 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 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.