Kanagawa, Japan

Kei Nagatomo

This inventor holds 5 USPTO granted patents and 4 published patent applications. Top assignee: Panasonic Corporation. Active years: 2009-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kei Nagatomo. Retrieved from https://idiyas.com/inventor/kei-nagatomo

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

USPTO Granted Patents = 5 

% Patents Active = 60.0

Average Co-Inventor Count = 3.2

ph-index = 2

Forward Citations = 12(Granted Patents)


Location History:

  • Yokohama, JP (2009)
  • Kanagawa, JP (2009 - 2010)
  • Kyoto, JP (2012)

Company Filing History:


Years Active: 2009-2012

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5 patents (USPTO):Explore Patents

Title: Kei Nagatomo: Innovator in Crystal Oscillator Technology

Introduction

Kei Nagatomo is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of crystal oscillator technology, holding a total of 5 patents. His work focuses on enhancing the performance and stability of crystal oscillators, which are essential components in various electronic devices.

Latest Patents

Nagatomo's latest patents include a crystal-oscillator circuit designed to achieve further stabilization of output frequency changes during the startup of the power supply. This innovative circuit incorporates a quartz crystal unit, a first variable-capacitance element, and a temperature compensation circuit. The temperature compensation circuit provides a control signal to compensate for the temperature characteristics of the quartz crystal unit. Additionally, his work includes an integrated circuit (IC) for controlling a temperature-compensated crystal oscillator, which features a mode selector circuit and various terminals for power and data input.

Career Highlights

Kei Nagatomo is currently employed at Panasonic Corporation, where he continues to develop cutting-edge technologies in the field of oscillators. His expertise and innovative approach have positioned him as a key figure in the advancement of electronic components.

Collaborations

Nagatomo has collaborated with notable colleagues such as Hisato Takeuchi and Keigo Shingu. Their combined efforts have contributed to the development of advanced technologies in their respective fields.

Conclusion

Kei Nagatomo's contributions to crystal oscillator technology demonstrate his commitment to innovation and excellence. His patents reflect a deep understanding of electronic components and their applications, making him a valuable asset in the industry.

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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