Inventor

UMEZAWA KAZUYOSHI

JP5 patents

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

FUJI ELECTRIC CO LTD

4 patents

US5381328AJan 10, 1995

PWM inverter control system and method

FUJI ELECTRIC CO LTD34 citations90

US11275124B2Mar 15, 2022

Abnormality cause identifying method, abnormality cause identifying device, power converter and power conversion system

FUJI ELECTRIC CO LTD2 citations63

US10790698B2Sep 29, 2020

Uninterruptible power supply system and uninterruptible power supply

FUJI ELECTRIC CO LTD0 citations47

US11539237B2Dec 27, 2022

Uninterruptible power supply system and uninterruptible power supply

FUJI ELECTRIC CO LTD0 citations43

YAMADA TOSHIYA

1 patent

US8743571B2Jun 3, 2014

Distributed power supply system with harmonic signal generation for stabilization

YAMADA TOSHIYA1 citations45