Inventor

KAWAUCHI KUNIHIRO

JP8 patents

⚠️ This page may combine multiple inventors who share the name “KAWAUCHI KUNIHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI LTD

3 patents

US6344721B2Feb 5, 2002

Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus

HITACHI LTD47 citations95

US6563286B2May 13, 2003

Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus

HITACHI LTD23 citations92

US6340873B2Jan 22, 2002

Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus

HITACHI LTD27 citations92

RENESAS TECH CORP

3 patents

US7119508B2Oct 10, 2006

Drive control device for direct current motor, rotation drive system for direct current motor and semiconductor integrated circuit for driving coil

RENESAS TECH CORP28 citations92

US6771033B2Aug 3, 2004

Drive control system for sensor-less motor

RENESAS TECH CORP31 citations91

US6801382B2Oct 5, 2004

Magnetic disk storage apparatus

RENESAS TECH CORP10 citations72

HITACHI ULSI SYS CO LTD

1 patent

US7071640B2Jul 4, 2006

Rotation drive control circuit of multiphases direct current motor and the start-up method thereof

HITACHI ULSI SYS CO LTD52 citations92

HITACHI TOBU SEMICONDUCTOR LTD

1 patent

US6900604B2May 31, 2005

Drive control system for sensor-less motor

HITACHI TOBU SEMICONDUCTOR LTD43 citations90