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Expired Canadian patentCanada

Automatic circuit tester control system

CA 1260536 A · Owner: Teradyne, Inc. · Inventors: Sulman, David L.; Walker, Ernest P.; Van Der Kloot, Robert H.

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

Apparatus for providing high speed control of digital test patterns and analog instruments in automatic circuit testing apparatus including a sequence controller including a random access memory ("RAM") for microcode and an address generator for selectively addressing instructions in said random access memory, a sequence address bus connected to the address generator of the sequence controller, digital test pattern RAM connected to the sequence address bus, and analog instruments including associated RAM loaded with microcode for the instruments and connected to the sequence address bus.

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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 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.
FiledDecember 15, 1987
GrantedSeptember 26, 1989
Term endedSeptember 26, 2006
Patent numberCA 1260536 A
Classification (IPC)G01R31/28 +2 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedDec 15, 1987Patent grantedSep 26, 1989Term endedSep 26, 2006

Sources & verification

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