JPH056246B2 - - Google Patents

Info

Publication number
JPH056246B2
JPH056246B2 JP59235060A JP23506084A JPH056246B2 JP H056246 B2 JPH056246 B2 JP H056246B2 JP 59235060 A JP59235060 A JP 59235060A JP 23506084 A JP23506084 A JP 23506084A JP H056246 B2 JPH056246 B2 JP H056246B2
Authority
JP
Japan
Prior art keywords
magnetic
coercive force
magnetic 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.)
Expired - Lifetime
Application number
JP59235060A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61115201A (ja
Inventor
Jiro Suzuki
Masayasu Suzuki
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 JPS61115201A (ja) 1986-06-02
JPH056246B2 true JPH056246B2 (en]) 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 (en])

Families Citing this family (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
JP2542651B2 (ja) * 1987-12-08 1996-10-09 凸版印刷株式会社 磁気カ―ド

Family Cites Families (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
JPS5827881B2 (ja) * 1979-08-24 1983-06-13 東北金属工業株式会社 磁気記録再生装置
JPS60219635A (ja) * 1984-04-14 1985-11-02 Tohoku Metal Ind Ltd 磁気カ−ド

Also Published As

Publication number Publication date
JPS61115201A (ja) 1986-06-02

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