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The Nec Corporation patent solves the following problem:
Our analysis of this patent is as follows:
Nec Corporation’s patent US 4780855 A deals with System for controlling a nonvolatile memory having a data portion and a corresponding indicator portion.
A nonvolatile memory (automatic) consists of a large equity memorial, each composed of a plurality of memory. Each of the parts of the memorial is composed of a first nonvolatile memory area that can hide data in a predetermined small number and a second nonvolatile memory area containing a sign for the corresponding first nonvolatile memory area. Each of the logical memory given a logical discourse, and when the write operation killed, a controller working with logical access memory recognizes the inputted logical address to erase been reasonable memorial of memory a signal indicating that the data is stored, and writing the data inputted into the memory after wiping the memory part.
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