P

Inventor

SUZUKI NORINAGA

JP10 patents
⚠️ This page may combine multiple inventors who share the name “SUZUKI NORINAGA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI LTD

4 patents
USD358753SMay 30, 1995

Frequency inverter

HITACHI LTD93 citations93
US6486548B1Nov 26, 2002

Semiconductor module and power converting apparatus using the module

HITACHI LTD28 citations92
US5949663ASep 7, 1999

Inverter apparatus capable of readily modification of the specification and performance thereof

HITACHI LTD31 citations92
USD343382SJan 18, 1994

Frequency inverter

HITACHI LTD26 citations91

HITACHI IND EQUIPMENT SYS

3 patents
US7477530B2Jan 13, 2009

Frequency converting apparatus and control method for the apparatus

HITACHI IND EQUIPMENT SYS8 citations80
US7782641B2Aug 24, 2010

Frequency converting apparatus and control method for the apparatus

HITACHI IND EQUIPMENT SYS4 citations58
US8882476B2Nov 11, 2014

Oil-flooded screw compressor, motor drive system, and motor control

HITACHI IND EQUIPMENT SYS1 citations51

KAMEYA HIROTAKA

1 patent
US8491280B2Jul 23, 2013

Oil-flooded screw compressor, motor drive system, and motor control device

KAMEYA HIROTAKA5 citations70

OKUBO TOMOFUMI

1 patent
US9136788B2Sep 15, 2015

Motor controller, air compressor, air conditioner, controller of passenger conveyor and controller of conveyor

OKUBO TOMOFUMI6 citations66

HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD

1 patent
US11933291B2Mar 19, 2024

Compressor, monitoring system, and method of monitoring compressor

HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD0 citations45