Recording and reproducing apparatus
US5777977A · kind A · utility
51Cited by
2References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Aug 22, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/947
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording and reproducing apparatus has a recording and/or reading head having a tip for recording and/or reproducing information on and/or from a recording medium. Information is recorded and/or erased by way of a polarization reversal or transport of electric charges in a predetermined area of the recording medium in response to application of a pulse voltage from the head. The information recorded in the predetermined area is detected as a change in the electric charges or an electrostatic capacitance or a surface potential or their differential in the predetermined area for reproducing the information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.