Vertical recording magnetic head
US5003423A · kind A · utility
32Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Mar 22, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/1278
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A vertical recording magnetic head is disposed for movement close to or into sliding contact with a vertical recorded magnetic medium for purpose of magnetic recording and playback. To prevent the influences of external magnetic field upon a recording or reproduced magnetic field, a main magnetic pole of the head is surrounded by a block of a magnetizable material which exhibits a high permeability, which serves as a magnetic shield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.