Shiojiri, Japan

Tomokazu Yamada

This inventor holds 23 USPTO granted patents and 1 published patent application and 3 EPO patents, primarily in Liquid Ejection Technology. Top assignee: Seiko Epson Corporation. Active years: 2016-2022.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tomokazu Yamada. Retrieved from https://idiyas.com/inventor/tomokazu-yamada

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

USPTO Granted Patents = 23 

% Patents Active = 100.0


Average Co-Inventor Count = 1.1

ph-index = 3

Forward Citations = 22(Granted Patents)


Location History:

  • Shiojiri, JP (2016 - 2022)
  • Nagano, JP (2017 - 2022)

Company Filing History:


Years Active: 2016-2022

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Areas of Expertise:
Liquid Ejecting Apparatus
Drive Circuit
Integrated Circuit
Print Head
Piezoelectric Element
Liquid Discharge
Circuit Substrate
Capacitive Load Driving
Head Unit
Liquid Ejection
Control Circuit
23 patents (USPTO):Explore Patents

Title: Innovations in Liquid Ejecting Technology: The Patents of Tomokazu Yamada

Introduction: Tomokazu Yamada, a prominent inventor based in Shiojiri, Japan, has made significant contributions to the field of liquid ejecting technology. With an impressive portfolio of 23 patents, his innovations play a crucial role in enhancing the performance and efficiency of liquid ejecting apparatuses.

Latest Patents: Tomokazu's recent patents focus on the development of advanced liquid ejecting apparatuses and their accompanying circuits. One such patent describes a liquid ejecting apparatus that integrates an innovative feedback mechanism, allowing for improved modulation and consistent DC voltage output. The design ensures the efficiency of signal processing by strategically arranging circuit components, enhancing the performance of liquid dispensing systems.

Another notable patent introduces a drive circuit that utilizes a modulated drive signal to control the operation of a drive element effectively. The integrated circuit within this innovation encompasses a modulation circuit that provides amplified control signals, contributing to the overall effectiveness of the liquid ejecting apparatus.

Career Highlights: Working with Seiko Epson Corporation, Tomokazu Yamada has been able to leverage his expertise in circuit design and engineering to spearhead advancements in liquid ejection technologies. His dedication to innovation has solidified his reputation in the field, positioning him as a leader in developing high-performance systems for various applications.

Collaborations: Throughout his career, Tomokazu has collaborated with talented coworkers, including Motonori Chikamoto and Hidehiko Yajima. Together, they have worked on groundbreaking projects, combining their skills and knowledge to foster advancements in the technology landscape.

Conclusion: Tomokazu Yamada's contributions to liquid ejecting technology demonstrate the power of innovation in improving efficiency and performance in various applications. With 23 patents to his name and ongoing collaborations at Seiko Epson Corporation, his work continues to inspire the next generation of inventors and researchers.

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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