Title:
【発明の名称】改良型のディスク
Document Type and Number:
Japanese Patent JP2863000
Kind Code:
B2
Abstract:
The invention relates to an improved disc unit provided with a module (1) comprising integrated circuits and connectors (5), and devices connecting said module to a disc reader and to a computer. A connection head (2) provided with connectors (4), a bus (3) and an input/output controller E/S are used. Files charged in a read only or read programmable memory of the module, keys, devices for testing the keys, coding frames, devices for forbidding or authorizing reading allow to achieve a good protection against pirating of commercial softwares as well as a perfect confidentiality.
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Inventors:
UERUNOWA GURUAN JAN AREN
Application Number:
JP50070690A
Publication Date:
March 03, 1999
Filing Date:
November 30, 1989
Export Citation:
Assignee:
UERUNOWA GURUAN JAN AREN
International Classes:
B23B3/16; B23Q16/10; B23B29/32; B23Q1/26; B23Q1/70; B23Q16/08; F42B5/02; F42B12/70; G06F21/80; G06K19/077; G11B19/04; G11B20/00; G11B23/00; G11B23/03; G11B23/28; G11B23/30; G11B27/11; G11C7/24; G11C16/22; (IPC1-7): G11B23/30
Domestic Patent References:
| JP6257167A | ||||
| JP6313187A | ||||
| JP6316484A | ||||
| JP6273382U |
Attorney, Agent or Firm:
Takashi Koshiba