Inventor · disambiguated record
Yasufumi Okumura
Also filed as: OKUMURA YASUFUMI
13 granted patents·35 citations·filing 2003–2020
87Inventor score
Files withKAWASAKI HEAVY IND LTD8KAWASAKI RAILCAR MFG CO LTD2NISHIMURA TAKEHIRO2SUMITOMO ELECTRIC INDUSTRIES1
Top patents by PatentIndex Score
13 records- 0189US8297199B2Railcar primary suspensionNISHIMURA TAKEHIRO·Filed 2011·Granted Oct 30, 2012·12 cites·10 claims
- 0280US9592840B2Railcar axle box suspensionKAWASAKI HEAVY IND LTD·Filed 2014·Granted Mar 14, 2017·6 cites·8 claims
- 0380US9545933B2Air spring and railcarKAWASAKI HEAVY IND LTD·Filed 2014·Granted Jan 17, 2017·5 cites·8 claims
- 0470US9573604B2Railcar bogieKAWASAKI HEAVY IND LTD·Filed 2016·Granted Feb 21, 2017·1 cites·5 claims
- 0569US10422685B2Load measuring device for railcar bogieKAWASAKI HEAVY IND LTD·Filed 2014·Granted Sep 24, 2019·3 cites·9 claims
- 0668US9358989B2Railcar bogieNISHIMURA TAKEHIRO·Filed 2012·Granted Jun 7, 2016·2 cites·19 claims
- 0760US10053119B2Plate spring cover and railcar bogie including plate spring coverKAWASAKI HEAVY IND LTD·Filed 2014·Granted Aug 21, 2018·1 cites·5 claims
- 0860US9802627B2Railcar bogieKAWASAKI HEAVY IND LTD·Filed 2014·Granted Oct 31, 2017·1 cites·9 claims
- 0954US7004078B2Truck for railroad carKAWASAKI HEAVY IND LTD·Filed 2003·Granted Feb 28, 2006·4 cites·4 claims
- 1052US11407434B2Rubbing plate of side bearer of railcar bogie and side bearerKAWASAKI RAILCAR MFG CO LTD·Filed 2020·Granted Aug 9, 2022·0 cites·17 claims
- 1148US11787451B2Axle box suspension and elastic bushing shaft body for use in railcarKAWASAKI RAILCAR MFG CO LTD·Filed 2019·Granted Oct 17, 2023·0 cites·7 claims
- 1246US10086850B2Air springSUMITOMO ELECTRIC INDUSTRIES·Filed 2015·Granted Oct 2, 2018·0 cites·5 claims
- 1342US10399579B2Axle box suspension of railcar bogieKAWASAKI HEAVY IND LTD·Filed 2016·Granted Sep 3, 2019·0 cites·6 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →