Inventor
TAKAMATSU HISASHI
JP29 patents
⚠️ This page may combine multiple inventors who share the name “TAKAMATSU HISASHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
16 patentsUS5905995AMay 18, 1999
Disk array subsystem with self-reallocation of logical volumes for reduction of I/O processing loads
HITACHI LTD52 citations96
US5734812AMar 31, 1998
Storage unit with parity generation function and storage systems using storage unit with parity generation analyzation
HITACHI LTD34 citations96
US5119488AJun 2, 1992
Input/output system implementing several access paths for rerouting data in the event one path fails
HITACHI LTD59 citations96
US6966001B2Nov 15, 2005
Computing system and data decryption method and computer system with remote copy facility
HITACHI LTD36 citations92
US6473867B2Oct 29, 2002
Parity storage unit, in a disk array system, for generating updated parity data from received data records
HITACHI LTD28 citations92
US4807180AFeb 21, 1989
Multiple control system for disk storage and method for realizing same
HITACHI LTD43 citations92
US4792917ADec 20, 1988
Control apparatus for simultaneous data transfer
HITACHI LTD42 citations92
US5457791AOct 10, 1995
Storage system and method of control
HITACHI LTD50 citations91
US6032263AFeb 29, 2000
Parity storage unit, in a disk array system, for generating updated parity data from received data records
HITACHI LTD12 citations82
US6209107B1Mar 27, 2001
Parity storage unit, in a disk array system, for generating updated parity data from received data records
HITACHI LTD9 citations73
US5826002AOct 20, 1998
Parity storage unit, in a disk array system for generating updated parity data from received data records
HITACHI LTD9 citations73
US4926272AMay 15, 1990
Method for controlling a rotating storage unit
HITACHI LTD11 citations73
US4805048AFeb 14, 1989
Method for controlling to keep off defects on magnetic disks
HITACHI LTD6 citations63
US7953940B2May 31, 2011
Storage system and control method thereof
HITACHI LTD5 citations62
US7765602B2Jul 27, 2010
Storage on-demand system, and method for processing data in the same
HITACHI LTD3 citations62
US5315451AMay 24, 1994
Rotating storage track format emulation
HITACHI LTD0 citations51
FUJITSU LTD
9 patentsUS6744958B2Jun 1, 2004
Apparatus and method of compensating for wavelength dispersion of optical transmission line
FUJITSU LTD24 citations93
US5537244AJul 16, 1996
Light amplifier
FUJITSU LTD31 citations93
US5764400AJun 9, 1998
Optical modulator
FUJITSU LTD23 citations92
US5223975AJun 29, 1993
Polarization beam coupler including a splitter for producing an output monitor beam
FUJITSU LTD25 citations92
US6738182B2May 18, 2004
Optical fiber amplifier
FUJITSU LTD8 citations74
US5283842AFeb 1, 1994
Operating point trimming method for optical waveguide modulator and switch
FUJITSU LTD10 citations74
US5125053AJun 23, 1992
Optical coupler ultizing prisms
FUJITSU LTD15 citations74
US5015055AMay 14, 1991
Polarization coupler
FUJITSU LTD10 citations74
US7397981B2Jul 8, 2008
Apparatus and method of compensating for wavelength dispersion of optical transmission line
FUJITSU LTD0 citations52