JPS61115201A - 磁気記録方式 - Google Patents

磁気記録方式

Info

Publication number
JPS61115201A
JPS61115201A JP23506084A JP23506084A JPS61115201A JP S61115201 A JPS61115201 A JP S61115201A JP 23506084 A JP23506084 A JP 23506084A JP 23506084 A JP23506084 A JP 23506084A JP S61115201 A JPS61115201 A JP S61115201A
Authority
JP
Japan
Prior art keywords
magnetic
coercive force
layer
card
data
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.)
Granted
Application number
JP23506084A
Other languages
English (en)
Japanese (ja)
Other versions
JPH056246B2 (enrdf_load_stackoverflow
Inventor
Jiro Suzuki
次郎 鈴木
Masayasu Suzuki
雅康 鈴木
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.)
Tomoegawa Co Ltd
Original Assignee
Tomoegawa Paper Co Ltd
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 Tomoegawa Paper Co Ltd filed Critical Tomoegawa Paper Co Ltd
Priority to JP23506084A priority Critical patent/JPS61115201A/ja
Publication of JPS61115201A publication Critical patent/JPS61115201A/ja
Publication of JPH056246B2 publication Critical patent/JPH056246B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
JP23506084A 1984-11-09 1984-11-09 磁気記録方式 Granted JPS61115201A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23506084A JPS61115201A (ja) 1984-11-09 1984-11-09 磁気記録方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23506084A JPS61115201A (ja) 1984-11-09 1984-11-09 磁気記録方式

Publications (2)

Publication Number Publication Date
JPS61115201A true JPS61115201A (ja) 1986-06-02
JPH056246B2 JPH056246B2 (enrdf_load_stackoverflow) 1993-01-26

Family

ID=16980481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23506084A Granted JPS61115201A (ja) 1984-11-09 1984-11-09 磁気記録方式

Country Status (1)

Country Link
JP (1) JPS61115201A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63194991A (ja) * 1987-02-09 1988-08-12 有限会社ビタ 磁気カ−ド
JPH01150588A (ja) * 1987-12-08 1989-06-13 Toppan Printing Co Ltd 磁気カード

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51129209A (en) * 1975-05-02 1976-11-10 Toshiba Corp Record reproducing method by polylayer magnetic card
JPS5634108A (en) * 1979-08-24 1981-04-06 Tohoku Metal Ind Ltd Magnetic recording and reproducing apparatus
JPS60219635A (ja) * 1984-04-14 1985-11-02 Tohoku Metal Ind Ltd 磁気カ−ド

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51129209A (en) * 1975-05-02 1976-11-10 Toshiba Corp Record reproducing method by polylayer magnetic card
JPS5634108A (en) * 1979-08-24 1981-04-06 Tohoku Metal Ind Ltd Magnetic recording and reproducing apparatus
JPS60219635A (ja) * 1984-04-14 1985-11-02 Tohoku Metal Ind Ltd 磁気カ−ド

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63194991A (ja) * 1987-02-09 1988-08-12 有限会社ビタ 磁気カ−ド
JPH01150588A (ja) * 1987-12-08 1989-06-13 Toppan Printing Co Ltd 磁気カード

Also Published As

Publication number Publication date
JPH056246B2 (enrdf_load_stackoverflow) 1993-01-26

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