Global Patent Index - EP 0961301 A4

EP 0961301 A4 20010718 - A MAGNETIC MARKER

Title (en)

A MAGNETIC MARKER

Title (de)

MAGNETISCHES ETIKETT

Title (fr)

MARQUEUR MAGNETIQUE

Publication

EP 0961301 A4 20010718 (EN)

Application

EP 98953009 A 19981111

Priority

  • JP 9805069 W 19981111
  • JP 31498397 A 19971117

Abstract (en)

[origin: WO9926257A1] A small magnetic marker that can be used with high sensitivity both in a generally-called large Barkhausen system and a generally-called high permeability system. The length of the magnetic marker including a soft magnetic material is not more than 70 mm. The soft magnetic material, when an alternating magnetic field of a strength less than 0.20e is applied thereto, causes steep magnetic reversal with a magnetic flux change of more than 8.0 x 10<-9> Wb. The variation of magnetic field strength when the soft magnetic material causes a steep magnetization reversal is preferably 0.10e or less.

IPC 1-7

H01F 1/12; H01F 10/00; G08B 13/24

IPC 8 full level

G08B 13/24 (2006.01); H01F 1/03 (2006.01); H01F 1/153 (2006.01)

CPC (source: EP)

G08B 13/2408 (2013.01); G08B 13/2434 (2013.01); G08B 13/2442 (2013.01); H01F 1/0304 (2013.01); H01F 1/15391 (2013.01)

Citation (search report)

  • [XA] GB 2264715 A 19930908 - PITNEY BOWES INC [US]
  • [A] US 4660025 A 19870421 - HUMPHREY FLOYD B [US]
  • [A] EP 0226812 A2 19870701 - VACUUMSCHMELZE GMBH [DE]
  • [A] KAWAMURA H ET AL: "REINFORCED LARGE BARKHAUSEN AND MATTEUCCI EFFECTS AND MAGNETOELASTIC WAVES IN COLD-DRAWN AND THEN TORSION ANNEALED AMORPHOUS WIRES", IEEE TRANSLATION JOURNAL ON MAGNETICS IN JAPAN,US,IEEE INC, NEW YORK, vol. 4, no. 6, 1 June 1989 (1989-06-01), pages 368 - 377, XP000165636, ISSN: 0882-4959
  • [A] YANO N ET AL: "LARGE BARKHAUSEN DISCONTINUITY OF CO-FE-SI-B AMORPHOUS FILMS SPUTTERED ON POLYMER SUBSTRATE", IEEE TRANSACTIONS ON MAGNETICS,US,IEEE INC. NEW YORK, vol. 32, no. 5, 1 September 1996 (1996-09-01), pages 4532 - 4534, XP000634060, ISSN: 0018-9464
  • See references of WO 9926257A1

Designated contracting state (EPC)

DE ES FR IT

DOCDB simple family (publication)

WO 9926257 A1 19990527; DE 69837528 D1 20070524; DE 69837528 T2 20070809; EP 0961301 A1 19991201; EP 0961301 A4 20010718; EP 0961301 B1 20070411; ES 2284215 T3 20071101

DOCDB simple family (application)

JP 9805069 W 19981111; DE 69837528 T 19981111; EP 98953009 A 19981111; ES 98953009 T 19981111