Rewritable label for recording time information

Details Rewritable label for recording time information Rewritable label for recording time information

2005-05-24

2005-05-24

Ngo, Huyen (Department: 2871)

Liquid crystal cells, elements and systems

Liquid crystal system

Liquid crystal for recording or imaging on photosensitive...

C349S175000, C349S199000

Reexamination Certificate

active

06897906

ABSTRACT:
A method of recording rewritable time related information on a label, includes the steps of providing an electrically rewritable label associated with an article which includes a plurality of rewritable segments, each such segment having a layer including a material which is effective in at least first and second optical states so that the time related information can be written, rewritten and viewed, wherein such time related information relates to usage or potential usage of the article or a device associated with the article and such time related information can be electrically changed by providing appropriate electrical fields to the material, and electrically addressing selected segments to write or rewrite appropriate time related information.

REFERENCES:
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patent: 5290066 (1994-03-01), Mody et al.
patent: 5437811 (1995-08-01), Doane et al.
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patent: 6002383 (1999-12-01), Shimada
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patent: 6201587 (2001-03-01), Sakamaki
patent: 6414435 (2002-07-01), Akiba
patent: 6423368 (2002-07-01), Stephenson et al.
U.S. Appl. No. 09/799,220, filed Mar. 5, 2001 by Stephenson.

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