Patent · US Expired

Recording and reproduction of items of information using ROM-RAM storage media

US5715232A · kind A · utility

9Cited by

11References

4Claims

0Family size

Assignee

Deutsche Thomson-Brandt GmbH · DE

Inventors

Yoshiharu Chikazawa · Yokohama, JP
Akira Kawamura · Kawasaki, JP
Yasuaki Morimoto · Villingen-Schwenningen, DE
Friedhelm Zucker · Mönchweiler, DE
Christian Buchler · Villingen-Schwenningen, DE

Key dates

Filing date	Nov 27, 1995
Grant date	Feb 3, 1998
Priority date	—
Expiry date	Nov 27, 2015

Classification

Technology area (CPC G)Physics
CPC primaryG11B21/10
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A magneto optical disc system includes a disc having permanently recorded tracks overlain with magneto optical recording material. Data is recorded in the magneto optical material in tracks superimposed over the permanently recorded tracks, using the read-only data to define magneto optical tracks. The magneto optically recorded data is correlated with the prerecorded data for defining the location of data stored in the magneto-optic tracks.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.