Yokohama, Japan

Tetsuro Fukui

This inventor holds 86 USPTO granted patents, plus 2 CIPO patents and 5 EPO patents, primarily in Piezoelectric Technologies (CPC class 430203). Top assignees: Canon Kabushiki Kaisha, Tokyo Institute of Technology, Oriental Photo Industrial Co., Ltd.. Active years: 1990-2015.


% Patents Active = 72.1


 

Average Co-Inventor Count = 4.7

ph-index = 14

Forward Citations = 791(Granted Patents)

Forward Citations (Not Self Cited) = 667(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Kawasaki, JP (1990 - 1999)
  • Kanagawa-ken, JP (2003 - 2006)
  • Kanagawa, JP (2004 - 2011)
  • Yokohama, JP (1996 - 2015)

Company Filing History:


Years Active: 1990-2015

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Areas of Expertise:
Piezoelectric Element
Liquid Discharge Head
Piezoelectric Actuator
Perovskite Type Oxide
Dielectric Film Structure
Epitaxial Film
Ferroelectric Element
Ink Jet Head
Liquid Ejecting Head
Manufacturing Method
86 patents (USPTO):Explore Patents

Title: Tetsuro Fukui - Pioneering Innovator in Piezoelectric Technologies

Introduction

Tetsuro Fukui is a prominent inventor located in Yokohama, Japan. With an impressive portfolio of 86 patents, he has made significant contributions to the field of piezoelectric ceramics. His innovative work has paved the way for advancements in various applications, including liquid discharge heads and ultrasonic motors.

Latest Patents

Among his latest patents, Fukui has developed a novel piezoelectric ceramic that incorporates barium titanate along with specific concentrations of manganese. This innovative composition includes 0.04 mass % or more and 0.20 mass % or less manganese relative to barium titanate. The piezoelectric ceramic is structured with crystal grains, which consist of two types: crystal grains A, having an equivalent circular diameter of 30 µm or more and 300 µm or less, and crystal grains B, with an equivalent circular diameter of 0.5 µm or more and 3 µm or less. Notably, the crystal grains A and B form aggregates, resulting in a unique sea-island structure that enhances the performance of the material.

Career Highlights

Fukui has held notable positions in his career, primarily with Canon Kabushiki Kaisha, a renowned corporation known for its contributions to imaging and information technology. His expertise and groundbreaking research have significantly influenced the development of advanced piezoelectric materials and devices.

Collaborations

Throughout his career, Tetsuro Fukui has collaborated with esteemed colleagues, including Kenichi Takeda and Takanori Matsuda. Their joint efforts have furthered research and innovation in the field, leading to the successful development of groundbreaking technologies.

Conclusion

Tetsuro Fukui stands out as a leading figure in the realm of piezoelectric inventions. His contribution of 86 patents reflects a dedication to innovation and excellence. As technology continues to evolve, Fukui's work promises to play an essential role in the advancement of piezoelectric applications, underscoring the importance of research and development in shaping the future.

Profile summary based on public USPTO records.
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