JPS576163B2 - - Google Patents

Info

Publication number
JPS576163B2
JPS576163B2 JP11487873A JP11487873A JPS576163B2 JP S576163 B2 JPS576163 B2 JP S576163B2 JP 11487873 A JP11487873 A JP 11487873A JP 11487873 A JP11487873 A JP 11487873A JP S576163 B2 JPS576163 B2 JP S576163B2
Authority
JP
Japan
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.)
Expired
Application number
JP11487873A
Other languages
Japanese (ja)
Other versions
JPS4975116A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
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 filed Critical
Publication of JPS4975116A publication Critical patent/JPS4975116A/ja
Publication of JPS576163B2 publication Critical patent/JPS576163B2/ja
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
    • G11B23/281—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs by changing the physical properties of the record carrier
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/16—Layers for recording by changing the magnetic properties, e.g. for Curie-point-writing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
JP11487873A 1972-10-20 1973-10-15 Expired JPS576163B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT898672A AT343373B (de) 1972-10-20 1972-10-20 Magnetogrammtrager zur nicht unbemerkt veranderbaren aufzeichnung magnetischer signale und verfahren zur herstellung solcher aufzeichnungen

Publications (2)

Publication Number Publication Date
JPS4975116A JPS4975116A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-07-19
JPS576163B2 true JPS576163B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1982-02-03

Family

ID=3610215

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11487873A Expired JPS576163B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-10-20 1973-10-15

Country Status (9)

Country Link
US (1) US3883892A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS576163B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) AT343373B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE806345A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1003954A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2344644C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2204006B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1439213A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT994466B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105458U (ja) * 1991-01-16 1992-09-10 日本電池株式会社 電池用液口栓部

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1524187A (en) * 1974-10-16 1978-09-06 Emi Ltd Magnetic recording
US4239959A (en) * 1977-03-23 1980-12-16 General Kinetics Incorporated Perpetuation of information in magnetically recorded medium
DE2950174A1 (de) * 1979-12-13 1981-06-19 Basf Ag, 6700 Ludwigshafen Verfahren und vorrichtung zur echtheitspruefung von aufzeichnungstraegern, die gegen faelschung zu sichern sind
DE2950129A1 (de) 1979-12-13 1981-06-19 BASF Corp., New York, N.Y. Verfahren und vorrichtung zur echtheitspruefung von aufzeichnungstraegern, die gegen faelschung zu sichern sind
US4404603A (en) * 1980-05-27 1983-09-13 Warren Eugene D Apparatus and method for inspecting magnetic tape recorded material for alterations
EP0215023B1 (en) * 1985-03-18 1990-12-05 McWHIRTER HOLDINGS PTY LIMITED Magnetic tape cassette having a prerecorded low frequency tone
US4980782A (en) * 1985-06-03 1990-12-25 Peter Ginkel Software protection and identification system
US4858036A (en) * 1986-08-04 1989-08-15 Peter Ginkel Software protection and identification system
US4639584A (en) * 1985-07-25 1987-01-27 Adams Robert T Non-alterable magnetic coding
US4706282A (en) * 1985-12-23 1987-11-10 Minnesota Mining And Manufacturing Company Decoder for a recorder-decoder system
US5533759A (en) * 1994-09-13 1996-07-09 Eastman Kodak Company Method of currency or document validation by use of a temperature sensitive magnetic pattern
JP2001076331A (ja) * 1999-09-02 2001-03-23 Toshiba Corp 磁気記録媒体及び磁気記録再生装置
DE10008097A1 (de) * 2000-02-22 2001-09-20 Forschungszentrum Juelich Gmbh Markierungseinrichtung sowie Verfahren zum Auslesen einer solchen Markierungseinrichtung
EP1662486A1 (en) * 2004-11-29 2006-05-31 EMPA Eidgenössische Materialprüfungs- und Forschungsanstalt Process for storing information in a magnetic multi-layer device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134094A (en) * 1963-07-02 1964-05-19 Litton Systems Inc Spin resonant transducer
US3648257A (en) * 1966-08-24 1972-03-07 Minnesota Mining & Mfg Sheetlike material, the method of storing an image consisting of differing magnetic, electrical, and optical properties
US3521294A (en) * 1967-03-13 1970-07-21 Ampex Magneto thermal recording process and apparatus
FR1524309A (fr) * 1967-03-29 1968-05-10 Centre Nat Rech Scient Mémoires d'informations binaires à structures magnétiques en couches minces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105458U (ja) * 1991-01-16 1992-09-10 日本電池株式会社 電池用液口栓部

Also Published As

Publication number Publication date
ATA898672A (de) 1977-09-15
GB1439213A (en) 1976-06-16
IT994466B (it) 1975-10-20
BE806345A (fr) 1974-04-22
FR2204006B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-03-11
AT343373B (de) 1978-05-26
JPS4975116A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-07-19
FR2204006A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-05-17
CA1003954A (en) 1977-01-18
DE2344644C2 (de) 1982-04-15
DE2344644A1 (de) 1974-05-02
US3883892A (en) 1975-05-13

Similar Documents

Publication Publication Date Title
FR2201534A2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CS161680B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CS162208B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU4933872A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CS154077B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CS155927B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CS163918B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CS160019B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CS159955B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CS159839B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CS159564B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CS159541B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CS156820B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH569572A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH580061A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH562819A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH562894A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH563174A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH563862A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH564200A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH564403A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH564457A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH568853A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH569178A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH562404A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)