P

Inventor

OKUBO TOMOFUMI

JP12 patents
⚠️ This page may combine multiple inventors who share the name “OKUBO TOMOFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

VERISIGN INC

4 patents
US10728273B1Jul 28, 2020

Systems, devices, and methods for detecting and mitigating domain name registrations used for malicious behavior

VERISIGN INC14 citations85
US10432584B1Oct 1, 2019

Managing lame delegated domains within a managed DNS service

VERISIGN INC6 citations65
US11190479B2Nov 30, 2021

Detection of aberrant domain registration and resolution patterns

VERISIGN INC0 citations62
US10326794B2Jun 18, 2019

Anycast-based spoofed traffic detection and mitigation

VERISIGN INC0 citations36

HITACHI IND EQUIPMENT SYS

3 patents
US7276876B2Oct 2, 2007

Synchronous motor driving apparatus

HITACHI IND EQUIPMENT SYS12 citations83
US7030589B2Apr 18, 2006

Driving systems of AC motor

HITACHI IND EQUIPMENT SYS11 citations83
US6954050B2Oct 11, 2005

Control method and control device of permanent-magnet type synchronous motor

HITACHI IND EQUIPMENT SYS14 citations83

HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD

2 patents
US10644638B2May 5, 2020

Electric motor system

HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD0 citations50
US11933291B2Mar 19, 2024

Compressor, monitoring system, and method of monitoring compressor

HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD0 citations45

HITACHI HOME & LIFE SOLUTIONS

1 patent
US7064514B2Jun 20, 2006

Motor drive system for AC motors

HITACHI HOME & LIFE SOLUTIONS35 citations92

HITACHI LTD

1 patent
US6169670B1Jan 2, 2001

Inverter apparatus operatable over extended frequency range while suppressing output error

HITACHI LTD28 citations87

OKUBO TOMOFUMI

1 patent
US9136788B2Sep 15, 2015

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

OKUBO TOMOFUMI6 citations66