Inventor · disambiguated record
Tomofumi Okubo
Also filed as: OKUBO TOMOFUMI
12 granted patents·2 pending applications·126 citations·filing 2000–2020
90Inventor score
Files withVERISIGN INC4HITACHI IND EQUIPMENT SYS3HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD2HITACHI LTD2HITACHI HOME & LIFE SOLUTIONS1
Top patents by PatentIndex Score
14 records- 0192US10728273B1Systems, devices, and methods for detecting and mitigating domain name registrations used for malicious behaviorVERISIGN INC·Filed 2017·Granted Jul 28, 2020·14 cites·15 claims
- 0286US7064514B2Motor drive system for AC motorsHITACHI HOME & LIFE SOLUTIONS·Filed 2004·Granted Jun 20, 2006·35 cites·17 claims
- 0382US10432584B1Managing lame delegated domains within a managed DNS serviceVERISIGN INC·Filed 2017·Granted Oct 1, 2019·6 cites·22 claims
- 0479US7276876B2Synchronous motor driving apparatusHITACHI IND EQUIPMENT SYS·Filed 2005·Granted Oct 2, 2007·12 cites·20 claims
- 0568US6169670B1Inverter apparatus operatable over extended frequency range while suppressing output errorHITACHI LTD·Filed 2000·Granted Jan 2, 2001·28 cites·10 claims
- 0665US6954050B2Control method and control device of permanent-magnet type synchronous motorHITACHI IND EQUIPMENT SYS·Filed 2004·Granted Oct 11, 2005·14 cites·20 claims
- 0761US9136788B2Motor controller, air compressor, air conditioner, controller of passenger conveyor and controller of conveyorOKUBO TOMOFUMI·Filed 2009·Granted Sep 15, 2015·6 cites·4 claims
- 0861US7030589B2Driving systems of AC motorHITACHI IND EQUIPMENT SYS·Filed 2004·Granted Apr 18, 2006·11 cites·20 claims
- 0956US10644638B2Electric motor systemHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2017·Granted May 5, 2020·0 cites·9 claims
- 1048US11933291B2Compressor, monitoring system, and method of monitoring compressorHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2020·Granted Mar 19, 2024·0 cites·15 claims
- 1147US11190479B2Detection of aberrant domain registration and resolution patternsVERISIGN INC·Filed 2017·Granted Nov 30, 2021·0 cites·20 claims
- 1238US2004113572A1Control apparatus for controlling inverter for driving permanent magnet types synchronous motorHITACHI LTD·Filed 2003·Application pending·0 cites
- 1337US10326794B2Anycast-based spoofed traffic detection and mitigationVERISIGN INC·Filed 2016·Granted Jun 18, 2019·0 cites·21 claims
- 1436US2003071588A1System for driving electric motorFiled 2002·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →