logo

For the Inventor, By the Inventor

Nagano, Japan

Hirokazu Nunokawa

This inventor holds 72 USPTO granted patents and 4 published patent applications and 3 EPO patents, primarily in Liquid Ejection Technology (CPC class B41J). Top assignee: Seiko Epson Corporation. Active years: 2002-2014.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirokazu Nunokawa. Retrieved from https://idiyas.com/inventor/hirokazu-nunokawa

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 72 

% Patents Active = 27.8

 

Average Co-Inventor Count = 1.9

ph-index = 8

Forward Citations = 205(Granted Patents)

Forward Citations (Not Self Cited) = 192(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Matsumato, JP (2009)
  • Masumato, JP (2010)
  • Shiojiri, JP (2008 - 2011)
  • Suwa, JP (2007 - 2012)
  • Matsumoto, JP (2009 - 2012)
  • Nagano-ken, JP (2002 - 2013)
  • Nagano, JP (2014)

Company Filing History:

goldMedal72 out of 34,268 
 
Seiko Epson Corporation
 patents

Years Active: 2002-2014

Loading Chart...
Loading Chart...
Areas of Expertise:
Liquid Ejecting Apparatus
Printing Method
Transport Method
Nozzle Inspection
Medium Transport
Correction Method
Ink Ejection
Liquid Discharge
Printing System
Recording Apparatus
Test Pattern
Transport Amount Correction
72 patents (USPTO):Explore Patents
1. 8814299 - Fluid discharge device, nozzle inspection method, and medium on which nozzle inspection program is recorded (2014-08-26),
2. 8459764 - Printing apparatus and printing method (2013-06-11),
3. 8303066 - Liquid ejecting apparatus (2012-11-06),
4. 8292393 - Recording apparatus and transport method (2012-10-23),
5. 8277020 - Liquid ejection method and liquid ejection apparatus (2012-10-02),
6. 8132880 - Liquid ejecting device and method of controlling liquid ejecting device (2012-03-13),
7. 8075085 - Printing apparatus and printing method (2011-12-13),
8. 8061798 - Liquid ejecting apparatus and printing system (2011-11-22),
9. 8033630 - Liquid ejecting method and liquid ejecting apparatus (2011-10-11),
10. 8033627 - Printing apparatus and printing method (2011-10-11),
11. 8029085 - Recording method (2011-10-04),
12. 8029082 - Liquid discharging apparatus, liquid discharging method, and program (2011-10-04),
13. 7992992 - Transport amount correcting method, recording apparatus, and storage medium having program stored thereon (2011-08-09),
14. 7992978 - Liquid ejecting apparatus, liquid ejecting method, and program (2011-08-09),
15. 7988249 - Liquid ejecting apparatus (2011-08-02),

Title: The Innovative Contributions of Hirokazu Nunokawa

Introduction

Hirokazu Nunokawa, based in Nagano-ken, Japan, is a prominent inventor known for his extensive contributions to the fields of printing technology and fluid dynamics. With a remarkable portfolio of 72 patents, Nunokawa has made significant advancements that enhance the efficiency and functionality of various devices.

Latest Patents

Among his latest innovations, Nunokawa has developed a fluid discharge device designed to minimize the number of unstable nozzles following inspection. This device features a discharge head capable of releasing fluid from the nozzle and includes a comprehensive inspection process to ensure optimal performance. The controller in the system conducts a pre-process that prepares nozzles for fluid discharge, allowing for meticulous inspection and operational reliability.

In addition, he has patented a printing apparatus and method that optimizes ink ejection. This innovative printing system consists of a head that can eject multiple types of ink, with varying amounts dispensed based on designated tone values. The drive signal generating section is responsible for creating micro-adjusted drive signals that cater to the specific ink types, thus enhancing the printing quality and precision.

Career Highlights

Hirokazu Nunokawa's career is primarily associated with Seiko Epson Corporation, a leading company in imaging and printing technologies. His work at this organization has been instrumental in pushing the boundaries of what is possible in the realm of printing solutions and fluid dispensing mechanisms.

Collaborations

Throughout his journey, Nunokawa has collaborated with esteemed colleagues, including Toru Miyamoto and Bunji Ishimoto. These partnerships have facilitated a dynamic exchange of ideas and innovation, fostering an environment where technological advancements can thrive.

Conclusion

Hirokazu Nunokawa's dedication to his craft and his innovative spirit have significantly influenced the printing and fluid dynamic industries. With a growing list of patents and a commitment to excellence, Nunokawa continues to be a driving force behind new technological advancements, ensuring that the future of these industries remains bright.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Loading…