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Oka; Takafumi
Odawara, JP
No. of patents:

Patent Number Title Of Patent Date Issued
5774742 Peripheral device using two microprocessors and two buses for automatically updating program aft June 30, 1998
When a portable recording medium is judged to have been loaded in a peripheral device, a microprocessor of the peripheral device checks whether the portable recording medium is a recording medium bearing update data for use updating a program to be executed by the micro-processor. If
5748967 Program rewriting method and apparatus for multiprocessor system May 5, 1998
In at least two microprocessor systems each having a microprocessor, a flash electrically erasable programmable read only memory (EEPROM), and a system bus connected to the microprocessor and the memory, there is disposed a controller between the system buses of the respective systems.
4908793 Storage apparatus including a semiconductor memory and a disk drive March 13, 1990
An information recording and reproducing apparatus comprises a 31/2 inch hard disk drive, a semiconductor memory connected to the 31/2 inch hard disk drive for exchanging data, and a battery used to trasfer data in the semiconductor memory to the 31/2 inch hard disk drive when a power su
4775979 Error correction system October 4, 1988
An error correction system for a memory device of the type in which a data of plurality of bits is stored in a storage in the form of a coded word having as an end portion thereof a plurality of check bits produced in accordance with a predetermined parity check matrix H, and a random er
4698810 Data recording and reproducing system with error correction capability using ECC and CRC codes October 6, 1987
An optical disk system. Each of data blocks supplied from a higher ranked unit is divided into a plurality of code words, each of which is added with an error correction code to be subsequently recorded on an optical disk. In reproduction, each of the data blocks read out from the optica
4638472 Information recording system and method for using alternative record area in writing and reading January 20, 1987
An information recording method and system for writing information onto a recording medium. If an error area is detected in a check of the information read out of the medium after writing, the information is rewritten onto an alternative area on the recording medium using a buffer me
4160236 Feedback shift register July 3, 1979
A feedback shift register for use in a system processing a data signal received from a memory such as a magnetic disc or magnetic drum or from, for example, a communication line so as to detect and correct any error which may present in the data signal. The feedback shift register co

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