Magnetic tape cassettes provided with memory circuits for storing information
US4338644A · kind A · utility
162Cited by
12References
32Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1979 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Oct 22, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Cassettes of recording tape are provided with an electronic memory including semi-conductor circuits mounted in the cassette housing for storing data relating to the cassette or tape therein. A memory error signal device is also provided in the cassette housing having states representing that data stored on the cassette memory has an error or no error. Devices for a tape deck apparatus for cooperation with the cassette memory circuits and error signal device are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.