Shiojiri, Japan

Masao Nakayama

This inventor holds 57 USPTO granted patents and 4 published patent applications and 7 EPO patents, primarily in Piezoelectric Devices (CPC class B41J). Top assignee: Seiko Epson Corporation. Active years: 2005-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masao Nakayama. Retrieved from https://idiyas.com/inventor/masao-nakayama

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

USPTO Granted Patents = 57 

% Patents Active = 77.2

 

Average Co-Inventor Count = 2.5

ph-index = 4

Forward Citations = 45(Granted Patents)

Forward Citations (Not Self Cited) = 38(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Suwa, JP (2007 - 2009)
  • Chino, JP (2005 - 2012)
  • Nagano, JP (2014)
  • Shiojiri, JP (2013 - 2024)

Company Filing History:


Years Active: 2005-2026

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Areas of Expertise:
Piezoelectric Element
Liquid Ejecting Head
Piezoelectric Actuator
Liquid Discharge Head
MEMS Device
Liquid Ejecting Apparatus
Manufacturing Method
Ultrasonic Sensor
Piezoelectric Substrate
57 patents (USPTO):Explore Patents

Title: **Innovations of Masao Nakayama**

Introduction

Masao Nakayama is an accomplished inventor based in Shiojiri, Japan, with an impressive portfolio of 54 patents. His contributions to the field of piezoelectric technology have significantly impacted various applications, showcasing his expertise and innovative spirit.

Latest Patents

Among his numerous patents, Nakayama's recent innovations include a method for producing a piezoelectric actuator. This groundbreaking method involves forming a vibration plate, applying a first electrode, followed by a piezoelectric layer and a second electrode. The production process emphasizes a single-layer forming step, incorporating a metal layer containing zirconium and a metal oxide layer, with strict thickness specifications of less than 200 nm.

Another notable patent revolves around a piezoelectric substrate designed for diverse uses. This substrate consists of a base substrate, a first electrode, and a piezoelectric layer that includes potassium, sodium, and niobium. A critical aspect of this innovation is the full width at half maximum of the X-ray intensity peak on a specific plane of the piezoelectric layer, measured to ensure high-quality performance.

Career Highlights

Masao Nakayama currently works at Seiko Epson Corporation, a prominent leader in innovation and technology. His role encompasses groundbreaking research and development, focusing on enhancing piezoelectric materials and their applications. His extensive experience and commitment to innovation stand as a testament to his abilities as an inventor.

Collaborations

Throughout his career, Nakayama has collaborated with notable colleagues, including Eiju Hirai and Toshihiro Shimizu. These partnerships have allowed for the cross-pollination of ideas and advancements in their collective work on piezoelectric technologies, further emphasizing the importance of teamwork in driving innovation.

Conclusion

Masao Nakayama is a remarkable inventor whose contributions to piezoelectric technology reflect a deep understanding of materials science and engineering. His inventions at Seiko Epson Corporation pave the way for future developments in various fields, affirming his place as a significant figure in the world of innovation.

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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