US4814924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite memory device
Assignee: Maxell Ltd
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Filing: 1987-10-16
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Granted: 1989-03-21
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Expires: 2007-10-16
Abstract
Abstract Disclosed is a composite memory device which comprises a recording disc medium having a large number of recording tracks to and from which data is written and read, a housing for holding the recording disc medium, a rewritable semiconductor memory disposed within a portion of the housing, and pins disposed within a portion of the housing for transferring data between the semiconductor memory and an external device.
Inventors
- 👤 Tomotaka Ozeki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:44
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B23/0301; G11B23/0302; G11B23/0305; G11B23/30; G11B27/00; G11B27/10; G11B27/11; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2508; G11B2220/2512; G11B2220/60; G11B2220/65; G11B2220/652; G11B2220/657
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A composite memory device including a disc type recording medium having a large number of recording tracks to and from which data is written or read, and a housing for holding said disc type recording medium, characterized in that a rewritable semiconductor memory is provided in a portion of said housing at which said semiconductor memory does not interfere with said disc type recording medium, and pins are provided in a portion of the outer periphery of said housing so as to transfer signals between said semiconductor memory and an external device.
Claim 2
Dependent Claim
92 words
A composite memory device including a disc type recording medium having a large number of recording tracks to and from which data is written or read, and a housing for holding said disc type recording medium, characterized in that a rewritable semiconductor memory is provided in a portion of said housing at which said semiconductor memory does not interfere with said disc type recording medium, and pins are provided in a portion of the outer periphery of said housing so as to transfer signals between said semiconductor memory and an external device.
Claim 3
Dependent Claim
18 words
A composite memory device according to claim 1, wherein said disc type recording medium comprises a magnetic disc.
Claim 4
Dependent Claim
18 words
A composite memory device according to claim 1, wherein said disc type recording medium comprises an optical disc.
Claim 5
Dependent Claim
192 words
A composite memory device comprising: a disc type recording medium having a large number of recording tracks to and from which data is written and/or read; a housing for holding said disc type recording medium in such a manner as to be rotatable on a plane; a head entry aperture opened in a portion of the wall of said housing through which a head for transferring signals to and from said disc type recording medium is inserted; a shutter slidably mounted on the wall of said housing in such a manner that it opens or closes said head entry aperture by sliding along the surface of the wall of said housing; a rewritable semiconductor memory mounted in a portion of said housing; and pins of said semiconductor memory for transferring signals to and from an external device, at least a portion of said pins being positioned at a location at which it is screened by said shutter when said shutter is located at a position at which it covers said head entry aperture and is exposed when said shutter is located at a position at which it opens said head entry aperture.
Claim 6
Dependent Claim
192 words
A composite memory device comprising: a disc type recording medium having a large number of recording tracks to and from which data is written and/or read; a housing for holding said disc type recording medium in such a manner as to be rotatable on a plane; a head entry aperture opened in a portion of the wall of said housing through which a head for transferring signals to and from said disc type recording medium is inserted; a shutter slidably mounted on the wall of said housing in such a manner that it opens or closes said head entry aperture by sliding along the surface of the wall of said housing; a rewritable semiconductor memory mounted in a portion of said housing; and pins of said semiconductor memory for transferring signals to and from an external device, at least a portion of said pins being positioned at a location at which it is screened by said shutter when said shutter is located at a position at which it covers said head entry aperture and is exposed when said shutter is located at a position at which it opens said head entry aperture.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |