Inventor · disambiguated record
Tooru Hirai
Also filed as: HIRAI TOORU
11 granted patents·50 citations·filing 2001–2023
88Inventor score
Top patents by PatentIndex Score
11 records- 0185US7215843B2Optical switching apparatus and optical switching methodHITACHI LTD·Filed 2005·Granted May 8, 2007·9 cites·16 claims
- 0277US6987899B2Optical switching apparatus and optical switching methodHITACHI LTD·Filed 2003·Granted Jan 17, 2006·11 cites·4 claims
- 0376US7447398B2Optical crossconnect apparatusHITACHI COMM TECH LTD·Filed 2006·Granted Nov 4, 2008·6 cites·14 claims
- 0474US9638560B2Calibration method and flow rate measurement method for flow rate controller for gas supply deviceNAGASE MASAAKI·Filed 2011·Granted May 2, 2017·7 cites·3 claims
- 0571US6714697B2Optical switching apparatus and optical switching methodHITACHI LTD·Filed 2001·Granted Mar 30, 2004·7 cites·12 claims
- 0669US7848646B2Optical, network, node apparatus and method for recovery path faultHITACHI LTD·Filed 2006·Granted Dec 7, 2010·4 cites·8 claims
- 0761US7435013B2Variable dispersion compensation equipment, optical transmission system using it and method of setting dispersion compensation quantityHITACHI COMM TECH LTD·Filed 2005·Granted Oct 14, 2008·2 cites·9 claims
- 0861US6985649B2Optical switching apparatus and optical switching methodHITACHI LTD·Filed 2001·Granted Jan 10, 2006·3 cites·14 claims
- 0959US12450911B2Information output system, information output method, and information output programTOYOTA MOTOR CO LTD·Filed 2023·Granted Oct 21, 2025·0 cites·9 claims
- 1056US7218818B2Dispersion compensation device and dispersion compensation methodHITACHI COMM TECH LTD·Filed 2005·Granted May 15, 2007·1 cites·8 claims
- 1144US7415177B2Dispersion compensation device and dispersion compensation methodHITACHI COMM TECH LTD·Filed 2007·Granted Aug 19, 2008·0 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →