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Expired Canadian patentCanada

Digital oscilloscope and method of operation

CA 1233281 A · Owner: Tektronix, Inc. · Inventors: Saxe, Charles L.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A digital oscilloscope provides sine interpolation between sampled data points and includes means for intensifying the cathode-ray-tube display to emphasize portions of the cathode-ray-tube trace corresponding to original samples while de-emphasizing portions of the trace representing interpolated information. -1-

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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 February 23, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 23, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 11, 1985
GrantedFebruary 23, 1988
Term endedFebruary 23, 2005
Patent numberCA 1233281 A
Classification (IPC)G01R13/20

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedFeb 11, 1985Patent grantedFeb 23, 1988Term endedFeb 23, 2005

Sources & verification

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