Nagano-ken, Japan

Hirokazu Nunokawa

USPTO Granted Patents = 72 

 

Average Co-Inventor Count = 1.9

ph-index = 8

Forward Citations = 204(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:


Years Active: 2002-2014

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Areas of Expertise:
Fluid Discharge Device
Liquid Ejecting Apparatus
Printing Apparatus
Transport Method
Ink Ejection Correction
Nozzle Inspection Method
Recording Apparatus
Liquid Ejection Controlling Method
Test Pattern Production
Transport Amount Correction
Printing System
Color Tone Conversion
72 patents (USPTO):Explore Patents

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.

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