Inventor · disambiguated record
Seiichi Hayakawa
Also filed as: HAYAKAWA SEIICHI
6 granted patents·3 pending applications·58 citations·filing 2002–2023
79Inventor score
Files withHITACHI POWER SEMICONDUCTOR DEVICE LTD4AZUMA KATSUNORI2ASMO CO LT D1DENSO WIPER SYSTEMS INC1NIPPON WIPER BLADE CO LTD1
Top patents by PatentIndex Score
9 records- 0194US8519561B2Power module and vehicle-mounted inverter using the sameAZUMA KATSUNORI·Filed 2010·Granted Aug 27, 2013·27 cites·3 claims
- 0289US8422235B2Semiconductor device, and power conversion device using semiconductor deviceAZUMA KATSUNORI·Filed 2009·Granted Apr 16, 2013·21 cites·2 claims
- 0377US11496041B2Gate drive device, gate drive method, power semiconductor module, and electric power conversion deviceHITACHI POWER SEMICONDUCTOR DEVICE LTD·Filed 2021·Granted Nov 8, 2022·1 cites·9 claims
- 0462US11539361B2Semiconductor device signal transmission circuit for drive-control, method of controlling semiconductor device signal transmission circuit for drive-control, semiconductor device, power conversion device, and electric system for railway vehicleHITACHI POWER SEMICONDUCTOR DEVICE LTD·Filed 2021·Granted Dec 27, 2022·0 cites·8 claims
- 0550US6665903B2Wiper arm having coverASMO CO LT D·Filed 2002·Granted Dec 23, 2003·9 cites·15 claims
- 0646US12438115B2Power semiconductor moduleHITACHI POWER SEMICONDUCTOR DEVICE LTD·Filed 2020·Granted Oct 7, 2025·0 cites·10 claims
- 0746US2023282561A1Power semiconductor module and power conversion deviceHITACHI POWER SEMICONDUCTOR DEVICE LTD·Filed 2021·Application pending·0 cites
- 0845US2015360648A1Wiper armNIPPON WIPER BLADE CO LTD·Filed 2013·Application pending·0 cites
- 0945US2025196811A1Wiper armDENSO WIPER SYSTEMS INC·Filed 2023·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →