Inventor
IZUO SEIJI
JP14 patents
⚠️ This page may combine multiple inventors who share the name “IZUO SEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEIKO EPSON CORP
12 patentsUS7543904B2Jun 9, 2009
Print head inspection method, print head inspection device and a printing device
SEIKO EPSON CORP10 citations82
US11858000B2Jan 2, 2024
Ultrasonic device and ultrasonic sensor
SEIKO EPSON CORP0 citations62
US9211743B2Dec 15, 2015
Droplet discharge device and droplet discharge method
SEIKO EPSON CORP3 citations61
US8029088B2Oct 4, 2011
Liquid ejecting apparatus and ejection inspecting method
SEIKO EPSON CORP4 citations61
US7744188B2Jun 29, 2010
Print head check method and image forming apparatus
SEIKO EPSON CORP4 citations61
US7673956B2Mar 9, 2010
Print head inspection method, print head inspection apparatus, and printer
SEIKO EPSON CORP2 citations61
US7524014B2Apr 28, 2009
Image forming apparatus and image forming method
SEIKO EPSON CORP4 citations61
US12507998B2Dec 30, 2025
Ultrasonic apparatus
SEIKO EPSON CORP0 citations50
US9809028B2Nov 7, 2017
Print head check method and image forming apparatus
SEIKO EPSON CORP0 citations50
US12584787B2Mar 24, 2026
Ultrasonic sensor and method for manufacturing ultrasonic sensor
SEIKO EPSON CORP0 citations48
US10220612B2Mar 5, 2019
Drive signal adjustment method of liquid ejecting head and liquid ejecting apparatus
SEIKO EPSON CORP0 citations40
US7946675B2May 24, 2011
Liquid ejecting apparatus and ejection inspecting method
SEIKO EPSON CORP0 citations38