US4151574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head using a magnetic field-sensitive element and method of manufacturing same
Assignee: US Philips Corp
•
Filing: 1978-02-23
•
Granted: 1979-04-24
•
Expires: 1998-02-23
Abstract
Abstract A magnetic head for use in a magnetic reproduction device has a substrate in which a groove is provided. Provided on one wall of the groove is a magnetic field-sensitive element which is preferably positioned normal to an associated recording medium for coupling to the magnetic head.
Inventors
- 👤 Jan Gerkema
- 👤 Gerrit J. Koel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:48
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/39; G11B5/3903; G11B5/332; H; H10; H10N; H10N50/00; H10N50/10; G11B5/31; G11B5/3109; G11B5/3116; G11B5/3163
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
84 words
A magnetic head for reading data which are magnetically recorded on an associated relatively movable medium which comprises: a substrate having a generally planar face disposed in facing relationship with the associated medium, said face having a groove therein, said groove having a first side wall disposed in oblique relationship to said face, a magnetic field-sensitive element in the form of a thin film carried solely on said side wall of said groove and means for connecting said element to associated external sensing circuitry.
Claim 2
Dependent Claim
84 words
A magnetic head for reading data which are magnetically recorded on an associated relatively movable medium which comprises: a substrate having a generally planar face disposed in facing relationship with the associated medium, said face having a groove therein, said groove having a first side wall disposed in oblique relationship to said face, a magnetic field-sensitive element in the form of a thin film carried solely on said side wall of said groove and means for connecting said element to associated external sensing circuitry.
Claim 3
Dependent Claim
17 words
A magnetic head as claim in claim 1, wherein said magnetic field-sensitive element in a magnetoresistive element.
References Cited (Backward Citations)
US3564521A
Cited
US3686751A
Cited
US3814863A
Cited
US3840898A
Cited
US3987485A
Cited
US3887944A
Cited
US3881190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |