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Expired Canadian patentCanada

Method and arrangement for signal transmission in ultrasonic echo sounding systems

CA 1238110 A · Owner: Endress U. Hauser Gmbh U. Co. · Inventors: Lau, Jurgen; Berger, Wolfram; Michalski, Bernhard

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Abstract From the Canadian patent

Method and arrangement for signal transmission in ultrasonic echo sounding systems, An ultrasonic echo sounding apparatus disposed at a measuring location transmits ultrasonic pulses in successive transmission periods. The echo pulses received after reflection at a target are converted to electrical envelope signals which represent the envelope curves of the echo pulses. The envelope signals are transmitted via a connecting line to an evaluation apparatus disposed at an evaluation station remote from the measuring location. In the evaluation apparatus the envelope signals are evaluated for determining the target distance from the travel time of the ultrasonic pulses. The transmission of …

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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 June 14, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 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.
FiledNovember 2, 1984
GrantedJune 14, 1988
Term endedJune 14, 2005
Patent numberCA 1238110 A
Classification (IPC)G01F23/28 +2 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedNov 2, 1984Patent grantedJune 14, 1988Term endedJune 14, 2005

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