Inventor

Shinichiro Yamaguchi

Inventor

Hitachi, JP

Overview

1988–2002

Patent span

Physics

Primary field (CPC G)

Patents· 15 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G06Fprimary

G06FElectric digital data processing100%

PatentTitleYear

6,453,391'Multiplexed computer system'2002 6,032,265'Fault-tolerant computer system'2000 6,003,116'Multiplexed computer system with the capability to copy data from one processor memory to another'1999 5,852,728'Uninterruptible clock supply apparatus for fault tolerant computer system'1998 5,841,963'Dual information processing system having a plurality of data transfer channels'1998 5,737,513'Method of and system for verifying operation concurrence in maintenance/replacement of twin CPUs'1998 5,517,669'Cyclic data communication system'1996 5,146,569'System for storing restart address of microprogram, determining the validity, and using valid restart address to resume execution upon removal of suspension'1992 5,003,458'Suspended instruction restart processing system based on a checkpoint microprogram address'1991 4,967,339'Operation control apparatus for a processor having a plurality of arithmetic devices'1990 4,896,258'Data processor provided with instructions which refer to both tagged and tagless data'1990 4,841,439'Method for restarting execution interrupted due to page fault in a data processing system'1989 4,839,846'Apparatus for performing floating point arithmetic operations and rounding the result thereof'1989 4,811,269'Bit slice multiplication circuit'1989 4,764,869'Method and apparatus for controlling interruption in the course of instruction execution in a processor'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988–2002Patents assigned to HITACHI LTD (15)· patent assignee history

1988–1992Based in Hitachi, JP· patent location history

1989–1990Patents assigned to HITACHI ENG CO LTD (4)· patent assignee history

1996–2002Based in Mito, JP· patent location history

1998Patents assigned to HITACHI INF & CONTROL SYST (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	15	1988–2002
HITACHI ENG CO LTD	4	1989–1990
HITACHI INF & CONTROL SYST	1	1998

Locations

Location	Patents	Span
Hitachi, JP	8	1988–1992
Mito, JP	7	1996–2002