CA2033304A1 - Objet localisable destine aux utilisations souterraines et methode de localisation connexe - Google Patents

Objet localisable destine aux utilisations souterraines et methode de localisation connexe

Info

Publication number
CA2033304A1
CA2033304A1 CA002033304A CA2033304A CA2033304A1 CA 2033304 A1 CA2033304 A1 CA 2033304A1 CA 002033304 A CA002033304 A CA 002033304A CA 2033304 A CA2033304 A CA 2033304A CA 2033304 A1 CA2033304 A1 CA 2033304A1
Authority
CA
Canada
Prior art keywords
frequency
signal
cable
marker
frequencies
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002033304A
Other languages
English (en)
Inventor
Donald D. Davis
William S. Pesto
Al J. Schepis
Loyce A. Turner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2033304A1 publication Critical patent/CA2033304A1/fr
Abandoned legal-status Critical Current

Links

Landscapes

  • Geophysics And Detection Of Objects (AREA)
CA002033304A 1989-12-28 1990-12-27 Objet localisable destine aux utilisations souterraines et methode de localisation connexe Abandoned CA2033304A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45800289A 1989-12-28 1989-12-28
US458,002 1989-12-28

Publications (1)

Publication Number Publication Date
CA2033304A1 true CA2033304A1 (fr) 1991-06-29

Family

ID=23818961

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002033304A Abandoned CA2033304A1 (fr) 1989-12-28 1990-12-27 Objet localisable destine aux utilisations souterraines et methode de localisation connexe

Country Status (2)

Country Link
JP (1) JPH079464B2 (fr)
CA (1) CA2033304A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1548674A1 (fr) * 2003-12-25 2005-06-29 Hitachi, Ltd. Etiquette interrogeable par radio, procédé de production et appareil pour fabrication d'une telle étiquette
JP5007043B2 (ja) * 2005-12-19 2012-08-22 中国電力株式会社 ケーブル位置情報管理システム、装置、方法およびプログラム

Also Published As

Publication number Publication date
JPH04128682A (ja) 1992-04-30
JPH079464B2 (ja) 1995-02-01

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Dead