公开(公告)号：JPS6069833A

公开(公告)日：1985-04-20

申请号：JP14613184

申请日：1984-07-16

Applicant: BASF AG

Inventor： HERUMAN RORAA ,  AUGUSUTO REENAA ,  YOOAHIMU HATSUKU ,  BUERUNAA GURAU ,  BUERUNAA BARUTSU ,  RAINHORUTO BAURU

IPC: G11B5/842 ,  C09D5/23 ,  C09D7/12 ,  G11B5/70 ,  G11B5/702 ,  G11B5/73 ,  G11B5/735 ,  G11B5/84

公开(公告)号：JPH053659B2

公开(公告)日：1993-01-18

申请号：JP14613184

申请日：1984-07-16

Applicant: BASF AG

Inventor： HERUMAN RORAA ,  AUGUSUTO REENAA ,  YOOAHIMU HATSUKU ,  UERUNAA GURAU ,  UERUNAA BARUTSU ,  RAINHORUTO BAURU

IPC: G11B5/842 ,  C09D5/23 ,  C09D7/12 ,  G11B5/70 ,  G11B5/702 ,  G11B5/73 ,  G11B5/735 ,  G11B5/84

公开(公告)号：JPS5720976A

公开(公告)日：1982-02-03

申请号：JP7943181

申请日：1981-05-27

Applicant: BASF AG

Inventor： YOOAHIMU HATSUKU ,  ROORANTO BUROTSUTSURAA ,  KURAUSU SHIYURUTSUEEBERUGE ,  RUUDORUFU ANGAAMAN

IPC: G11B17/028 ,  G11B17/02 ,  G11B17/03

公开(公告)号：JPH0458092B2

公开(公告)日：1992-09-16

申请号：JP13923284

申请日：1984-07-06

Applicant: BASF AG

Inventor： AUGUSUTO REENAA ,  YOOAHIMU HATSUKU ,  KARURU KURUTSUKAA ,  UERUNAA BARUTSU ,  KARURU HAINTSU REEMAA ,  PEETAA RUDORUFU ,  ROORANTO FUARUKU ,  GYUNTAA ETSUKERUTO

IPC: G11B5/845 ,  C09D5/23 ,  G11B5/70 ,  G11B5/702 ,  G11B5/842

公开(公告)号：JPS57150139A

公开(公告)日：1982-09-16

申请号：JP1503982

申请日：1982-02-03

Applicant: BASF AG

Inventor： MANFUREETO GEERUNGU ,  KURAUSU SHIETORE ,  HERUMUUTO KURAISURAA ,  PEETAA RUDORUFU ,  YOOAHIMU HATSUKU ,  FURIIDORIHI ANSURINGAA

IPC: G11B5/84 ,  B24B7/13 ,  B24B7/16 ,  B24B21/04

公开(公告)号：JPS5894176A

公开(公告)日：1983-06-04

申请号：JP20049582

申请日：1982-11-17

Applicant: BASF AG

Inventor： KURAUSU MANTSUKE ,  ROORANTO BUROTSURAA ,  YOOAHIMU HATSUKU

IPC: G11B17/028

公开(公告)号：JPS5724003A

公开(公告)日：1982-02-08

申请号：JP8260981

申请日：1981-06-01

Applicant: Basf Ag

Inventor： YOOAHIMU HATSUKU ,  ROORANTO BUROTSUTSURAA ,  PEETAA FUERUAIZEN

IPC: G11B5/02 ,  G11B5/012 ,  G11B5/48 ,  G11B20/10

CPC classification number: G11B5/012 ,  G11B5/4886

公开(公告)号：JPS5697176A

公开(公告)日：1981-08-05

申请号：JP17391580

申请日：1980-12-11

Applicant: BASF AG

Inventor： EEBAAHARUTO KEESUTAA ,  YOOAHIMU HATSUKU ,  MANFUREETO SHIYUTOIAABUARUTO

IPC: G11B5/62 ,  C09D5/23 ,  C09D7/12 ,  G06K7/08 ,  G06K19/10 ,  G06K19/12 ,  G07D7/04 ,  G07D7/12 ,  G11B5/00 ,  G11B23/30

Abstract: A process for authenticating recording media which are to be safeguarded against falsification and which possess a layer of exchange-anisotropic magnetic material, by determining the residual recording which is left over, because of the exchange anisotropy of the magnetic material, from a recording of a sequence of signals after exposure of the material to a specific temperature cycle and, subsequently, to a magnetic AC field which decreases to zero, and an apparatus for carrying out the said process.

公开(公告)号：JPS5697175A

公开(公告)日：1981-08-05

申请号：JP17391480

申请日：1980-12-11

Applicant: BASF AG

Inventor： EEBAAHARUTO KEESUTAA ,  YOOAHIMU HATSUKU ,  MANFUREETO SHIYUTOIAABUARUTO

IPC: G06K19/10 ,  G06K7/08 ,  G06K19/12 ,  G07D7/04 ,  G11B5/00 ,  G11B23/30

Abstract: A process for authenticating recording media which are to be safeguarded against falsification and which possess discrete regions of an exchange-anisotropic magnetic material, by comparison of the polarity of a residual magnetization which is left over, because of the exchange anisotropy of the magnetic material, from a predetermined initial magnetization after exposure of the material to a specific temperature cycle and, subsequently, to a magnetic AC field which decreases to zero, with the polarity of a residual magnetization formed in the same way from an opposite initial magnetization, and an apparatus for carrying out the said process.

公开(公告)号：JP2573267B2

公开(公告)日：1997-01-22

申请号：JP32421087

申请日：1987-12-23

Applicant: BASF AG

Inventor： MIHYAERU HITSUFUERUTO ,  UERUNAA GURAU ,  YOOAHIMU HATSUKU

IPC: G11B5/72 ,  G11B5/64 ,  G11B5/71 ,  G11B5/725 ,  G11B5/82 ,  G11B5/84