US4982074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recording position information of last track recorded with data in directory area
Assignee: Canon Inc
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Filing: 1988-07-29
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Granted: 1991-01-01
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Expires: 2008-07-29
Abstract
Abstract A method of recording data is disclosed wherein data is recorded onto a recording medium having a plurality of tracks provided side by side. The data recording method includes sequentially recording a series of data on a track from one side of a medium; writing index information, including position information, of a last recorded track, after the series of data are completely recorded, in an area of the medium different from the area where the data is recorded; reading out the position information and seeking the last track on the basis of the position information read out and recording the next data on a track next to the sought last track.
Inventors
- 👤 Yutaka Ogasawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:11
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/002; G11B7/0033; G11B19/00; G11B19/02; G11B19/04; G11B20/00; G11B20/10; G11B20/18; G11B20/1879; G11B21/00; G11B21/02; G11B21/08; G11B21/081; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/32; G11B27/327; G11B27/36; G11B2020/10916
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
A method of recording data onto a recording medium including a recording area having a plurality of recording tracks arranged side by side, said method comprising the steps of: sequentially recording a series of data on a recording track from one side of the medium to another; writing index information in an area of the recording medium different than the recording area, subsequent to the series of data being completely recorded on a recording track in said recording step, the index information including position information of a last recorded track; reading out the position information written in said writing step and seeking the last recorded track on the basis of the position information read out; recording another series of data on a track next to the last recorded track sought in said seeking step; and checking a predetermined number of nonrecorded tracks after the last recorded track, prior to recording information on the track next to the last recorded track, the predetermined number of nonrecorded tracks being at least two.
Claim 2
Independent Claim
170 words
A method of recording data onto a recording medium including a recording area having a plurality of recording tracks arranged side by side, said method comprising the steps of: sequentially recording a series of data on a recording track from one side of the medium to another; writing index information in an area of the recording medium different than the recording area, subsequent to the series of data being completely recorded on a recording track in said recording step, the index information including position information of a last recorded track; reading out the position information written in said writing step and seeking the last recorded track on the basis of the position information read out; recording another series of data on a track next to the last recorded track sought in said seeking step; and checking a predetermined number of nonrecorded tracks after the last recorded track, prior to recording information on the track next to the last recorded track, the predetermined number of nonrecorded tracks being at least two.
Claim 3
Dependent Claim
44 words
A method according to claim 2, wherein the step of recording data comprises the steps of checking whether normal recording is performed in every track and recording the same data in a track next to the checked track when normal recording is not performed.
Claim 4
Dependent Claim
33 words
A method according to claim 2, wherein the step of checking comprises the steps of reading out the data recorded in the recording medium and comparing the data read out with original data.
Claim 5
Dependent Claim
66 words
A method according to claim 3, wherein the recording medium comprises a card-like medium and said method further comprises the step of reciprocally scanning the medium with a light beam spot for recording and reproducing data such that data is recorded during forward movement of the reciprocal scanning, and the step of checking comprises reading out the recorded data during backward movement of the reciprocal scanning.
Claim 6
Dependent Claim
15 words
A method according to claim 1, wherein the position information comprises a track address number.
Claim 7
Dependent Claim
22 words
A method according to claim 5, further comprising the step of writing the track address number in a track during data recording.
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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) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |