Optical record medium including a data region, an identification

Details Optical record medium including a data region, an identification Optical record medium including a data region, an identification

1990-10-09

1992-02-25

Weinhardt, Robert

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Particular code pattern

235487, 235454, 369 59, 3692753, G06K 100, G11B 7007

Patent

active

050916351

ABSTRACT:
An optical record medium in the form of a wallet-size optical card including a data region in which a number of data tracks are provided in parallel with each other, an identification region provided on one side of the data region, and a mark region provided on a side of the identification regions. Data signals are recorded in the data tracks and addresses of the data tracks are recorded in the identification region. Every time a data signal has been recorded in a data track, a mark is recorded in the mark region at such a position that the mark is aligned with the relevant data track viewed in a track direction.

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patent: 4730293 (1988-03-01), Pierce et al.
patent: 4733386 (1988-03-01), Shimoi
patent: 4760566 (1988-07-01), Kobayashi et al.
patent: 4791622 (1988-12-01), Clay et al.
patent: 4811321 (1989-03-01), Enari et al.

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