Patent US4296491A successfully refreshed from Google Patents.
US4296491A
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Information carrier having inter-track identification code information
Assignee: McDonnell Douglas Corp
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Filing: 1979-07-30
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Granted: 1981-10-20
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Expires: 1999-07-30
Abstract
Abstract An information carrier, and a method of recording thereon, wherein information containing signals are recorded in discrete tracks along with a unique address signal for each track. An identification code signal is also recorded at preselected locations between adjacent tracks.
Inventors
- 👤 Jonathan A. Jerome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:14
CPC Classifications
G; G11; G11B; G11B21/00; G11B21/02; G11B21/08; G11B21/081; G11B21/083; G11B17/00; G11B17/005; G11B27/00; G11B27/10; G11B27/102; G11B27/105; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B7/00; G11B7/007; G11B7/00745; G11B7/08; G11B7/085; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2537; G11B2220/2587; G11B2220/90
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
Information-containing apparatus comprising: (A) a substrate; (B) a recording medium deposited on said substrate; (C) a plurality of discrete signal data-containing tracks recorded in said medium; (D) a discrete address code representative of each of said data-containing tracks recorded at a preselected position in said medium and in line with said data-containing track with which the discrete address code is associated, said address codes all appearing within a predetermined region in said medium; and (E) an index code recorded in said medium and disposed in a direction laterally of said data-containing tracks and between adjacent address codes, said index code being representative of the location on said medium at which it is recorded.
Claim 2
Dependent Claim
113 words
Information-containing apparatus comprising: (A) a substrate; (B) a recording medium deposited on said substrate; (C) a plurality of discrete signal data-containing tracks recorded in said medium; (D) a discrete address code representative of each of said data-containing tracks recorded at a preselected position in said medium and in line with said data-containing track with which the discrete address code is associated, said address codes all appearing within a predetermined region in said medium; and (E) an index code recorded in said medium and disposed in a direction laterally of said data-containing tracks and between adjacent address codes, said index code being representative of the location on said medium at which it is recorded.
Claim 3
Dependent Claim
30 words
Information-containing apparatus as defined in claim 1 wherein said substrate is a disc, said address codes are recorded radially aligned, and said index code is recorded between said address codes.
Claim 4
Dependent Claim
20 words
Information-containing apparatus as defined in claim 1 wherein said data, said address code and said index code are optically recorded.
Claim 5
Dependent Claim
20 words
Information-containing apparatus as defined in claim 1 wherein said index code totally fills the lateral area between adjacent address codes.
Claim 6
Dependent Claim
48 words
Information-containing apparatus as defined in claim 1 wherein said index code between two adjacent address codes is identical to said address code in one of said tracks when said data is read from said apparatus by moving a reading means in a first direction laterally of said tracks.
Claim 7
Dependent Claim
16 words
Information-containing apparatus as defined in claim 1 wherein said index code between two adjacent tracks changes.
Claim 8
Independent Claim
76 words
The method of recording indexing information on a recording medium comprising: (A) generating a signal to be recorded which is representative of data and an address code; (B) recording said signal to be recorded on said medium to define a plurality of discrete data tracks thereon; (C) recording said address code in line with said data track; (D) generating an index code; (E) recording said index code in the laterally disposed space between said address codes.
Claim 9
Independent Claim
76 words
The method of recording indexing information on a recording medium comprising: (A) generating a signal to be recorded which is representative of data and an address code; (B) recording said signal to be recorded on said medium to define a plurality of discrete data tracks thereon; (C) recording said address code in line with said data track; (D) generating an index code; (E) recording said index code in the laterally disposed space between said address codes.
Claim 10
Dependent Claim
17 words
The method of claim 7 wherein said recording between tracks is done in a plurality of steps.
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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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |