Patent US5210738A successfully refreshed from Google Patents.
US5210738A
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US
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Optical information recording medium
Assignee: Pioneer Corp
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Filing: 1991-04-11
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Granted: 1993-05-11
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Expires: 2011-04-11
Abstract
Abstract An optical information recording medium, such as an optical disk, includes a meandering guide groove being varied in period according to first additional information and in amplitude according to second additional information. The optical information recording medium enables recording a plurality of kinds of information in addition to the first and second additional information in accordance with a multiple recording system.
Inventors
- 👤 Hiroki Iwata
- 👤 Yutaka Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:26
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/2407; G11B7/24073; G11B7/24082; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
An optical information recording medium having a meandering guide groove on its recording surface for writing information optically in the guide groove or between the adjoining guide grooves, being characterized in that: a period of meandering of the guide groove is varied by first additional information which comprises a digital address signal, and an amplitude of meandering of the guide groove is varied by second additional information and is kept within a range of 3-15% of the track pitch.
Claim 2
Dependent Claim
79 words
An optical information recording medium having a meandering guide groove on its recording surface for writing information optically in the guide groove or between the adjoining guide grooves, being characterized in that: a period of meandering of the guide groove is varied by first additional information which comprises a digital address signal, and an amplitude of meandering of the guide groove is varied by second additional information and is kept within a range of 3-15% of the track pitch.
Claim 3
Dependent Claim
24 words
An optical information recording medium as claimed in claim 1, wherein a width and a depth of the guide groove are maintained substantially constant.
Claim 4
Dependent Claim
41 words
An optical information recording medium as claimed in claim 1, wherein the guide groove is meandered periodically in a radial direction of the recording medium, whereby a frequency of meandering of the guide groove is frequency-modulated by the first additional information.
References Cited (Backward Citations)
US4535439A
Cited
US4587648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-10 | 1996-11-09 | 1997-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-10 | 2000-11-09 | 2001-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-10 | 2004-11-09 | 2005-05-11 | $7700.00 | Window Closed / Lapsed |