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Expired Canadian patentCanada

Automatic production control of extended work pieces

CA 1194211 A · Owner: Hoesch Werke Ag · Inventors: Schlusnus, Karl-Heinz; Gerling, Erich; Wahl, Hans J.

CIPO record

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

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Abstract From the Canadian patent

A method and apparatus for automatic production control of work pieces wherein ultrasonic test probes are disposed on opposite sides of the work piece and operating according to the pulse echo method. The apparatus includes an emitter for generating ultrasonic pulses and a test probe change over switch connected to the probe, a receiver and an amplifier for the signals from the test probes and connected to the respective ones thereof. A monitor and an integrator-monitor is connected to the amplifier, and output units connected to the monitor and integrator-monitor respectively. A drive is provided for relative motion between the work piece and the ultrasonic test probes. The method includes …

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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 24, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 27, 1982
GrantedSeptember 24, 1985
Term endedSeptember 24, 2002
Patent numberCA 1194211 A
Classification (IPC)G01N29/04 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedAug 27, 1982Patent grantedSep 24, 1985Term endedSep 24, 2002

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