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Expired Canadian patentCanada

Method and apparatus for orienting the display of information from a recirculating memory

CA 1115350 A · Owner: American Optical Corporation · Inventors: Mceachern, Robert A.; Day, Christopher C.

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Abstract From the Canadian patent

In apparatus such as a defibrillator having a CRT display of an ECG wave, and an alternative display of the firing time of the defibrillator pulse in relation to the ECG wave the, inclusion of method and apparatus for orienting the waveform to a synchronization indicator. In the preferred form the, display is a single, non-fade stationary complex of the ECG wave starting prior to the occurrence of the oriented "P" wave. The display is timed through combination of clocking pulses responsive to a wave detection apparatus and a recirculating memory which establishes an orienting marker. The clock pulsing includes a predetermined delay to initiation of display from the data recirculating memory …

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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 December 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 3, 1979
GrantedDecember 29, 1981
Term endedDecember 29, 1998
Patent numberCA 1115350 A
Classification (IPC)A61B5/02 +2 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedApril 3, 1979Patent grantedDec 29, 1981Term endedDec 29, 1998

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.