Inventor
NAGANUMA YOICHI
JP52 patents
⚠️ This page may combine multiple inventors who share the name “NAGANUMA YOICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEIKO EPSON CORP
49 patentsUS11331917B2May 17, 2022
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP2 citations73
US11225072B2Jan 18, 2022
Liquid ejecting head and liquid ejecting system
SEIKO EPSON CORP3 citations73
US9914300B2Mar 13, 2018
Head and liquid ejecting apparatus with electrically connecting bumps
SEIKO EPSON CORP2 citations73
US9705066B2Jul 11, 2017
Head and liquid ejecting apparatus
SEIKO EPSON CORP6 citations73
US9573371B2Feb 21, 2017
Head and liquid ejecting apparatus
SEIKO EPSON CORP5 citations73
US10000061B2Jun 19, 2018
Piezoelectric device, liquid ejecting head, and liquid ejecting apparatus
SEIKO EPSON CORP2 citations72
US12076991B2Sep 3, 2024
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations62
US11738557B2Aug 29, 2023
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations62
US11491785B2Nov 8, 2022
Liquid ejecting head and liquid ejecting system
SEIKO EPSON CORP0 citations62
US11390079B2Jul 19, 2022
MEMS device, liquid ejecting head, liquid ejecting apparatus, manufacturing method of MEMS device, manufacturing method of liquid ejecting head, and manufacturing method of liquid ejecting apparatus
SEIKO EPSON CORP0 citations62
US11230100B2Jan 25, 2022
Liquid discharging head and liquid discharging apparatus
SEIKO EPSON CORP0 citations62
US10500853B2Dec 10, 2019
Piezoelectric device, liquid ejecting head, and liquid ejecting apparatus
SEIKO EPSON CORP1 citations62
US11654681B2May 23, 2023
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations52
US11548280B2Jan 10, 2023
Liquid ejecting head and liquid ejecting system
SEIKO EPSON CORP0 citations52
US11225073B2Jan 18, 2022
Liquid ejecting head and liquid ejecting system
SEIKO EPSON CORP0 citations52
US10882316B2Jan 5, 2021
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations52
US10449764B2Oct 22, 2019
MEMS device, liquid ejecting head, liquid ejecting apparatus, manufacturing method of MEMS device, and manufacturing method of liquid ejecting head
SEIKO EPSON CORP0 citations52
US10272686B2Apr 30, 2019
MEMS device, liquid ejecting head, manufacturing method of MEMS device, and manufacturing method of liquid ejecting head
SEIKO EPSON CORP0 citations52
US10150294B2Dec 11, 2018
Inkjet head and inkjet printer
SEIKO EPSON CORP1 citations52
US10029459B2Jul 24, 2018
Piezoelectric device, liquid ejecting head, and liquid ejecting apparatus
SEIKO EPSON CORP0 citations52
US10000060B2Jun 19, 2018
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP1 citations52
US9944077B2Apr 17, 2018
MEMS device, liquid ejecting head, liquid ejecting apparatus, manufacturing method of MEMS device, and manufacturing method of liquid ejecting head
SEIKO EPSON CORP0 citations52
US9919522B2Mar 20, 2018
MEMS device, liquid ejecting head, liquid ejecting apparatus, manufacturing method of MEMS device, and manufacturing method of liquid ejecting head
SEIKO EPSON CORP0 citations52
US9914301B2Mar 13, 2018
Piezoelectric device, liquid ejecting head, and liquid ejecting apparatus
SEIKO EPSON CORP1 citations52
US9908331B2Mar 6, 2018
MEMS device and liquid ejecting head
SEIKO EPSON CORP0 citations52
US9844939B2Dec 19, 2017
Piezoelectric device, liquid ejecting head, and liquid ejecting apparatus
SEIKO EPSON CORP0 citations52
US9434162B2Sep 6, 2016
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP1 citations52
US9421767B2Aug 23, 2016
Liquid ejecting head and manufacturing method of liquid ejecting head
SEIKO EPSON CORP0 citations52
US9375921B2Jun 28, 2016
Piezoelectric element, liquid ejecting head, and liquid ejecting apparatus
SEIKO EPSON CORP1 citations52
US9346270B2May 24, 2016
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations52
US12138925B2Nov 12, 2024
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations51
US11833818B2Dec 5, 2023
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations51
US11554584B2Jan 17, 2023
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations51
US11292247B2Apr 5, 2022
Liquid discharging head and liquid discharging apparatus
SEIKO EPSON CORP0 citations51
US11167552B2Nov 9, 2021
Liquid discharging head and liquid discharging apparatus
SEIKO EPSON CORP0 citations51
US11072171B2Jul 27, 2021
Liquid discharging head and liquid discharging apparatus
SEIKO EPSON CORP0 citations51
US12370796B2Jul 29, 2025
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations50
US12491714B2Dec 9, 2025
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations49
US12576638B2Mar 17, 2026
Liquid ejecting head
SEIKO EPSON CORP0 citations47
US10807363B2Oct 20, 2020
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations42
US9950514B2Apr 24, 2018
Piezoelectric element, liquid ejecting head, and piezoelectric element device
SEIKO EPSON CORP0 citations42
US9919523B2Mar 20, 2018
Piezoelectric device, liquid ejecting head, and liquid ejecting apparatus
SEIKO EPSON CORP0 citations42
US9610770B2Apr 4, 2017
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations42
US9393784B2Jul 19, 2016
Piezoelectric element, liquid ejecting head, and liquid ejecting apparatus
SEIKO EPSON CORP0 citations42
US10639889B2May 5, 2020
MEMS device, liquid ejecting head, liquid ejecting apparatus, and manufacturing method of MEMS device
SEIKO EPSON CORP0 citations41
US10081181B2Sep 25, 2018
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations41
US10059102B2Aug 28, 2018
Inkjet head and inkjet printer
SEIKO EPSON CORP0 citations41
US10011113B2Jul 3, 2018
Manufacturing method of head
SEIKO EPSON CORP0 citations41
US9969159B2May 15, 2018
Liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations41
NIPPON STEEL CORP
1 patentShowing the top 50 of 52 patents by PatentIndex Score.