JPS52143003A - Magnetic card - Google Patents

Magnetic card

Info

Publication number
JPS52143003A
JPS52143003A JP6038076A JP6038076A JPS52143003A JP S52143003 A JPS52143003 A JP S52143003A JP 6038076 A JP6038076 A JP 6038076A JP 6038076 A JP6038076 A JP 6038076A JP S52143003 A JPS52143003 A JP S52143003A
Authority
JP
Japan
Prior art keywords
magnetic card
coercive force
high coercive
erased
permanent magnet
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.)
Pending
Application number
JP6038076A
Other languages
Japanese (ja)
Inventor
Riichiro Yamashita
Yasuhisa Iida
Masaru Ishibashi
Tetsuo Yamaguchi
Akira Mochizuki
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.)
Mitsubishi Heavy Industries Ltd
Mitsubishi Metal Corp
Original Assignee
Mitsubishi Heavy Industries Ltd
Mitsubishi Metal Corp
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 Mitsubishi Heavy Industries Ltd, Mitsubishi Metal Corp filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP6038076A priority Critical patent/JPS52143003A/en
Publication of JPS52143003A publication Critical patent/JPS52143003A/en
Pending legal-status Critical Current

Links

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE: To manufacture magnetic cards having high coercive force which cannot be erased by a permanent magnet used for a magnet holder, etc. by using specific high coercive force magnetic powder.
COPYRIGHT: (C)1977,JPO&Japio
JP6038076A 1976-05-25 1976-05-25 Magnetic card Pending JPS52143003A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6038076A JPS52143003A (en) 1976-05-25 1976-05-25 Magnetic card

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6038076A JPS52143003A (en) 1976-05-25 1976-05-25 Magnetic card

Publications (1)

Publication Number Publication Date
JPS52143003A true JPS52143003A (en) 1977-11-29

Family

ID=13140467

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6038076A Pending JPS52143003A (en) 1976-05-25 1976-05-25 Magnetic card

Country Status (1)

Country Link
JP (1) JPS52143003A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54138408A (en) * 1978-04-19 1979-10-26 Tokyo Jiki Insatsu Kk High coercive force magnetic medium
JPS6425504A (en) * 1987-07-22 1989-01-27 Toda Kogyo Corp Magnet-plumbite type ferrite granular powder for magnetic card and the preparation thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4838705A (en) * 1971-09-17 1973-06-07
JPS4932728B1 (en) * 1971-07-13 1974-09-02

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4932728B1 (en) * 1971-07-13 1974-09-02
JPS4838705A (en) * 1971-09-17 1973-06-07

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54138408A (en) * 1978-04-19 1979-10-26 Tokyo Jiki Insatsu Kk High coercive force magnetic medium
JPS6425504A (en) * 1987-07-22 1989-01-27 Toda Kogyo Corp Magnet-plumbite type ferrite granular powder for magnetic card and the preparation thereof

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