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For the Inventor, By the Inventor

Niigata, Japan

Yoshihiro Hagiwara

This inventor holds 55 USPTO granted patents, primarily in Ink Jet Printing (CPC class 347 ). Top assignees: Nec Corporation, Fuji Xerox Co., Ltd., Cocomo Mb Communications, Inc.. Active years: 1998-2005.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshihiro Hagiwara. Retrieved from https://idiyas.com/inventor/yoshihiro-hagiwara

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

USPTO Granted Patents = 55

% Patents Active = 96.4

Average Co-Inventor Count = 3.8

ph-index = 6

Forward Citations = 192(Granted Patents)

Forward Citations (Not Self Cited) = 175(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Niigata, JP (1999 - 2002)
  • Kashiwazaki, JP (2000 - 2002)
  • Saitama, JP (2004)
  • Tokyo, JP (1998 - 2005)

Company Filing History:

goldMedal50 out of 36,684 
 
Nec Corporation
 patents
silverMedal4 out of 11,665 
 
Fuji Xerox Co., Ltd.
 patents
bronzeMedal1 out of 7 
 
Cocomo Mb Communications, Inc.
 patents

Years Active: 1998-2005

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Areas of Expertise:
Ink Jet Printing
Electrostatic Ink Jet
Fluid Jetting
Toner Concentration
Recording Apparatus
Ink Ejection
Measurement Apparatus
Electrophoretic
Recording Head
Power Supply
Ink Supply Mechanism
Print Head
55 patents (USPTO):Explore Patents
1. 6956534 - Method and apparatus for improving antenna efficiency (2005-10-18),
2. 6824083 - Fluid jetting device, fluid jetting head, and fluid jetting apparatus (2004-11-30),
3. 6490921 - Oscillating liquid level measuring apparatus (2002-12-10),
4. 6480683 - Device for adjusting a developing solution for an electrostatic wet-type electrophotographic printer (2002-11-12),
5. 6412895 - Electrostatic ink jet printer (2002-07-02),
6. 6377760 - Toner concentration measuring apparatus (2002-04-23),
7. 6362859 - Electrostatic ink jet recording head having electrophoretic electrode and gravity ink reservoir (2002-03-26),
8. 6331046 - Electrostatic inkjet head having an ink drain for draining ink from a slit (2001-12-18),
9. 6236226 - Test method and system for uninterruptible power supply (2001-05-22),
10. 6224193 - Inkjet recording apparatus having gate electrodes and print head thereof (2001-05-01),
11. 6220696 - Simple electrostatic ink jet printing head having low cost (2001-04-24),
12. 6220695 - Ink-jet recording device for suppressing excess electrophoretic accumulation of charged particles (2001-04-24),
13. 6213591 - Injet recording apparatus (2001-04-10),
14. 6208321 - Electrostatic ink jet recorder having ejection electrodes and auxiliary electrodes divided into groups (2001-03-27),
15. 6190004 - Inkjet recording apparatus (2001-02-20),

Title: Yoshihiro Hagiwara: Pioneering Innovations in Technology

Introduction:

Yoshihiro Hagiwara, a prolific inventor based in Niigata, Japan, is renowned for his passion for innovation and unwavering commitment to advancing technology. With a remarkable 55 patents to his name, Hagiwara's groundbreaking work continues to inspire the next generation of inventors and engineers worldwide.

Latest Patents:

Among his latest patents is a method and apparatus for improving antenna efficiency. This innovative approach involves placing a non-grounded conductive object near an antenna, with an insulative layer separating the object and the antenna. Hagiwara's expertise also shines through in his creation of a fluid jetting device, fluid jetting head, and fluid jetting apparatus, designed with precision and efficiency in mind.

Career Highlights:

Hagiwara is a key member of NEC Corporation, a leading technology company at the forefront of cutting-edge developments. His contributions have significantly impacted the field of technology, with a focus on enhancing antenna performance and advancing fluid jetting techniques. Hagiwara's dedication to pushing the boundaries of innovation has earned him a well-deserved reputation as a visionary in the industry.

Collaborations:

Throughout his illustrious career, Hagiwara has collaborated with esteemed colleagues such as Hitoshi Minemoto and Kazuo Shima. Together, they have worked on pioneering projects that have propelled technological advancements and set new standards in the field of invention.

Conclusion:

In conclusion, Yoshihiro Hagiwara's relentless pursuit of technological excellence and his remarkable track record of patented innovations underscore his status as a trailblazer in the world of technology. His work not only shapes the present landscape but also paves the way for a brighter, more innovative future in which inventors and engineers alike can continue to push the boundaries of what is possible in the realm of technology.

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]
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