Patent US5559314A successfully refreshed from Google Patents.
US5559314A
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US
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Recording medium using reversible recording material and method of processing record to recording medium
Assignee: Toshiba Corp
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Filing: 1994-09-21
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Granted: 1996-09-24
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Expires: 2014-09-21
Abstract
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.
Inventors
- 👤 Tadayoshi Ohno
- 👤 Shinichi Itoh
- 👤 Takashi Yamaguchi
- 👤 Hisatoshi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:02
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/28; G11B23/283; G11B23/284; G06; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06046; G06K19/08; G06K19/10; G06K19/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
162 words
A method of processing a recording medium having a first recording layer wherein a first history information indicating data of use is rewritably recorded by being applied with first recording energy, and a second recording layer wherein a second history information which is different from the first history information and indicates a history of use is non-erasably recorded by Use of second recording energy higher than the first recording energy, said method comprising the steps of: recording the first history information on the first recording layer of the recording medium with the first recording energy; determining whether or not a part of the first history information recorded in the first recording layer satisfies a predetermined condition; preparing the second history information different from the first history information when the first history information satisfies said predetermined condition; and recording the second history information in the second recording layer in the recording medium with the second recording energy higher than the first recording energy.
Claim 2
Independent Claim
162 words
A method of processing a recording medium having a first recording layer wherein a first history information indicating data of use is rewritably recorded by being applied with first recording energy, and a second recording layer wherein a second history information which is different from the first history information and indicates a history of use is non-erasably recorded by Use of second recording energy higher than the first recording energy, said method comprising the steps of: recording the first history information on the first recording layer of the recording medium with the first recording energy; determining whether or not a part of the first history information recorded in the first recording layer satisfies a predetermined condition; preparing the second history information different from the first history information when the first history information satisfies said predetermined condition; and recording the second history information in the second recording layer in the recording medium with the second recording energy higher than the first recording energy.
Claim 3
Dependent Claim
34 words
A method according to claim 1, further comprising the step of reading values of the first recording energy and of the second recording energy from the history information recorded in the first recording layer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-09-24 | 2000-03-25 | 2000-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-24 | 2004-03-25 | 2004-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-24 | 2008-03-25 | 2008-09-24 | $7700.00 | Window Closed / Lapsed |