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Expired Canadian patentCanada

Semiconductor tester

CA 1093705 A · Owner: Huntron Instruments, Inc. · Inventors: Hunt, Bill

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

Abstract of the Disclosure An apparatus for testing the operating state of single and multiple semiconductor junctions either in, or out of circuit. The tester lncludes a testing circuit which in turn includes a transformer having a secondary with plurality of voltage tap leads which are selectively connectable by a switching device to a resistance and voltage divider array, which includes means adapted to receive the junction to be tested. The output of the testing circuit is applied to a display circuit which includes a visual indicator, which in turn produces a trace having a configuration representative of the forward and reverse characteristics of the function for inspection by an …

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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 January 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 13, 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 14, 1977
GrantedJanuary 13, 1981
Term endedJanuary 13, 1998
Patent numberCA 1093705 A
Classification (IPC)H01L21/66 +2 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedApril 14, 1977Patent grantedJan 13, 1981Term endedJan 13, 1998

Sources & verification

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