Patent US5244705A successfully refreshed from Google Patents.
US5244705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc-shaped recording medium
Assignee: Sony Corp
•
Filing: 1991-08-19
•
Granted: 1993-09-14
•
Expires: 2011-08-19
Abstract
Abstract A disc-shaped recording medium (32) has compressed audio data recording therein. The inner diameter (dI) of a data recording region (RA) is set to a value in a range of 28 to 50 mm. The outer diameter (dO) of the data recording region is set to a value corresponding to the inner diameter such that, for the lower limit value of 28 mm for the inner diameter the outer diameter is in the range of 58 to 62 mm, whereas for the upper limit value of 50 mm for the inner diameter the outer diameter is in the range of 71 to 73 mm. <IMAGE>
Inventors
- 👤 Katsuaki Tsurushima
- 👤 Tadao Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:14
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/00007; G11B20/10; G11B20/10527; G11B20/12; G11B20/1217; G11B20/1251; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3036; G11B27/3063; G11B27/32; G11B27/327; G11B27/329; G11B27/34; G11B27/36; G11B7/00; G11B7/007; G11B7/24; G11B2020/10537; G11B2020/10592; G11B2220/00; G11B2220/20; G11B2220/21; G11B2220/213; G11B2220/25; G11B2220/2525; G11B2220/2537; G11B2220/2545; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
168 words
A disc-shaped recording medium including a disc base plate having a recording surface and a second surface opposite the recording surface, wherein a data recording region of the recording surface is composed of material in which data can be recorded by optical means, wherein the data recording region has an inner diameter within a range of from 28 mm to 50 mm, and an outer diameter, wherein the outer diameter is in a range from 58 mm to 62 mm when the inner diameter is equal to 28 mm, wherein the outer diameter is in a range from 71 mm to 73 mm when the inner diameter is equal to 50 mm, wherein the outer diameter is greater than 58 mm and less than 68 mm when the inner diameter is greater than 28 but less than 42 mm, and wherein the outer diameter is greater than 65 mm and less than 73 mm when the inner diameter is greater than 42 mm but less than 50 mm.
Claim 2
Dependent Claim
168 words
A disc-shaped recording medium including a disc base plate having a recording surface and a second surface opposite the recording surface, wherein a data recording region of the recording surface is composed of material in which data can be recorded by optical means, wherein the data recording region has an inner diameter within a range of from 28 mm to 50 mm, and an outer diameter, wherein the outer diameter is in a range from 58 mm to 62 mm when the inner diameter is equal to 28 mm, wherein the outer diameter is in a range from 71 mm to 73 mm when the inner diameter is equal to 50 mm, wherein the outer diameter is greater than 58 mm and less than 68 mm when the inner diameter is greater than 28 but less than 42 mm, and wherein the outer diameter is greater than 65 mm and less than 73 mm when the inner diameter is greater than 42 mm but less than 50 mm.
Claim 3
Dependent Claim
39 words
The disc-shaped recording medium of claim 1, wherein the disc base plate has a centering hole extending therethrough, the second surface has a signal recording layer thereon, and the recording surface has a projecting portion around said centering hole.
Claim 4
Dependent Claim
56 words
The disc-shaped recording medium of claim 2, also including: a disc table having a centering member for engaging the projecting portion to center the disc-shaped recording medium relative to the disc table; and recording means for continuously recording compressed digital data on the data recording region when the centering member is engaged with the projecting portion.
Claim 5
Dependent Claim
55 words
The disc-shaped recording medium of claim 3, wherein the recording means also records data on a lead-in region of the recording surface, wherein the disc base plate has a centering hole extending therethrough, and wherein the lead-in region is an annular region of the recording surface between the data recording region and the centering hole.
Claim 6
Dependent Claim
24 words
The disc-shaped recording medium of claim 3, wherein said compressed digital data are compressed audio data having a compression ratio substantially equal to 1/4.
Claim 7
Dependent Claim
159 words
A disc-shaped recording medium including a disc base plate having a recording surface and a second surface opposite the recording surface, wherein a data recording region of the recording surface is composed of material in which data are prerecorded, wherein the data recording region has an inner diameter within a range of 28 to 50 mm, and an outer diameter, wherein the outer diameter is in a range from 58 mm to 62 mm when the inner diameter is equal to 28 mm, the outer diameter is in a range from 71 mm to 73 mm said inner diameter is equal to 50 mm, the outer diameter is greater than 58 mm and less than 68 mm when the inner diameter is greater than 28 mm but less than 42 mm, and the outer diameter is greater than 65 mm and less than 73 mm when the inner diameter is greater than 42 mm but less than 50 mm.
Claim 8
Dependent Claim
159 words
A disc-shaped recording medium including a disc base plate having a recording surface and a second surface opposite the recording surface, wherein a data recording region of the recording surface is composed of material in which data are prerecorded, wherein the data recording region has an inner diameter within a range of 28 to 50 mm, and an outer diameter, wherein the outer diameter is in a range from 58 mm to 62 mm when the inner diameter is equal to 28 mm, the outer diameter is in a range from 71 mm to 73 mm said inner diameter is equal to 50 mm, the outer diameter is greater than 58 mm and less than 68 mm when the inner diameter is greater than 28 mm but less than 42 mm, and the outer diameter is greater than 65 mm and less than 73 mm when the inner diameter is greater than 42 mm but less than 50 mm.
Claim 9
Dependent Claim
41 words
A disc-shaped recording medium as claimed in claim 6, wherein the disc base plate has a centering hole extending therethrough, the second surface has a signal recording layer thereon, and the recording surface has a projecting portion around said centering hole.
Claim 10
Dependent Claim
55 words
A disc-shaped recording medium as claimed in claim 7, also including: a disc table having a centering member for engaging the projecting portion to center the disc-shaped recording medium relative to the disc table; and recording means for continuously recording on the data recording region when the centering member is engaged with the projecting portion.
Claim 11
Dependent Claim
26 words
A disc-shaped recording medium as claimed in claim 8, wherein said compressed digital data are compressed audio data having a compression ratio substantially equal to 1/4.
Claim 12
Dependent Claim
55 words
The disc-shaped recording medium of claim 8, wherein the recording means also records data on a lead-in region of the recording surface, wherein the disc base plate has a centering hole extending therethrough, and wherein the lead-in region is an annular region of the recording surfaces between the data recording region and the centering hole.
References Cited (Backward Citations)
US4871404A
Cited
US4855979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-13 | 1997-03-15 | 1997-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-13 | 2001-03-15 | 2001-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-13 | 2005-03-15 | 2005-09-14 | $7700.00 | Window Closed / Lapsed |