Nagano, Japan

Tsuyoshi Kitahara

This inventor holds 77 USPTO granted patents and 3 EPO patents, primarily in Inkjet Technology (CPC class B41J). Top assignees: Seiko Epson Corporation, Eiko Epson Corporation, Other. Active years: 1990-2022.


% Patents Active = 66.2


Average Co-Inventor Count = 1.7

ph-index = 14

Forward Citations = 798(Granted Patents)

Forward Citations (Not Self Cited) = 776(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Suwa, JP (1990 - 2002)
  • Suwa-shi, Nagano, JP (2002)
  • Nagano-Ken, JP (2002 - 2011)
  • Matsumoto, JP (2005 - 2013)
  • Nagano, JP (1991 - 2022)

Company Filing History:


Years Active: 1990-2022

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Areas of Expertise:
Inkjet Technology
Piezoelectric Units
Liquid Jetting Methods
Color Filter Manufacturing
Ejecting Apparatus
Three-Dimensional Shaping
Organic EL Displays
Inkjet Recording Heads
Discharge Devices
Manufacturing Methods
Liquid Droplet Discharging
Electro Optical Devices
77 patents (USPTO):Explore Patents

Title: The Innovative Mind of Tsuyoshi Kitahara: Shaping the Future of Technology

Introduction: Tsuyoshi Kitahara, an esteemed inventor based in Nagano, JP, boasts an impressive portfolio of 77 patents. His innovative contributions to the field of technology have significantly influenced various industries, particularly in three-dimensional shaping and material arrangement.

Latest Patents: Tsuyoshi Kitahara's recent patents showcase his groundbreaking work in three-dimensional shaping technology. His notable inventions include a three-dimensional shaping apparatus, three-dimensional shaping system, and a three-dimensional shaped article production method. The three-dimensional shaping apparatus integrates a melting portion for material processing, an ejection portion for dispensing shaping material, and a shaping stage for stacking the material. Notably, it includes features for generating shape data, controlling mechanisms based on the data, and facilitating communication with a server to manage production information and identification of the shaped articles. In addition, he has developed a liquid material arrangement method aimed at precise droplet deposition on substrates, enhancing manufacturing processes for color filters and organic EL display devices.

Career Highlights: Throughout his career, Kitahara has made significant advancements while working with reputable organizations, including Seiko Epson Corporation. His dedication to innovation is evident in the patents he has developed, which continue to reshape approaches within the technological landscape.

Collaborations: Tsuyoshi Kitahara has collaborated with esteemed colleagues, including Noriaki Okazawa and Minoru Usui. Their collective expertise fosters a productive environment centered around innovation and groundbreaking inventions.

Conclusion: Tsuyoshi Kitahara stands out as a prominent inventor whose work continues to inspire future innovations. With a strong foundation in three-dimensional technology and material arrangement, his patents not only showcase his technical prowess but also contribute significantly to the evolution of various technologies. As the industry advances, Kitahara's contributions are likely to leave a lasting impact, proving that innovation knows no bounds.

Profile summary based on public USPTO records.
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