Recording medium using reversible recording material and method

Details Recording medium using reversible recording material and method Recording medium using reversible recording material and method

1994-09-21

1996-09-24

Hajec, Donald T.

Registers

Record controlled calculators

With printing

235487, G06K 1900, G06F 312

Patent

active

055593143

ABSTRACT:
A data storing medium comprising a substrate, a first display portion, provided on the substrate, for displaying predetermined data, the first display portion having a first recording material storing data by first recording energy, and erasing stored data of history of the use by predetermined erasing energy, and a second display portion, provided on the substrate, for displaying the same data as displayed by the first display portion, the second display portion having a second recording material for storing the data by a second recording energy different from the first recording energy, and stored data being impossible to be erased.

REFERENCES:
patent: 4707593 (1987-11-01), Murata et al.
patent: 4954985 (1990-09-01), Yamazaki
patent: 5055662 (1991-10-01), Hasegawa

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