Modem controller
CA 1262940 C · Owner: Hayes Microcomputer Products, Inc. · Inventors: Inskeep, Jeffrey; Thomas, George Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is initialization apparatus for the automatic forcing of a modem into a predetermined operating state in the event of excessive transients on the output voltage of the power supply of the modem, comprising in combination power supply means for providing operating voltage and current to the modem, high pass filter means connected to the power supply means for providing a filtered transient output signal, comparator means responsive to the filtered transient output signal and to a first predetermined reference voltage for providing a reset pulse of a predetermined minimum duration, and control means for controlling the operation of the modem and responsive to the reset pulse for …
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 November 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 14, 2006.
- 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.