Otsu, Japan

Masahiro Yamanaka

This inventor holds 4 USPTO granted patents and 2 published patent applications. Top assignee: Matsushita Electric Works, Ltd.. Active years: 1996-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masahiro Yamanaka. Retrieved from https://idiyas.com/inventor/masahiro-yamanaka-g4q3itda

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

Calculating rank
USPTO Granted Patents = 4 

% Patents Active = 50.0

Average Co-Inventor Count = 3.9

ph-index = 4

Forward Citations = 61(Granted Patents)


Location History:

  • Mino, JP (1996)
  • Kadoma, JP (1998)
  • Otsu, JP (2008)

Company Filing History:


Years Active: 1996-2008

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4 patents (USPTO):Explore Patents

Title: Masahiro Yamanaka: Innovator in Discharge Lamp Technology

Introduction

Masahiro Yamanaka is a notable inventor based in Otsu, Japan. He has made significant contributions to the field of lighting technology, particularly in the development of discharge lamp ballast devices. With a total of 4 patents to his name, Yamanaka continues to push the boundaries of innovation in his field.

Latest Patents

Yamanaka's latest patents include a discharge lamp ballast device and a lighting appliance. The discharge lamp ballast device features an inverter controller that operates at different switching frequencies, allowing for preheating, starting, and lighting modes. This innovative design includes a reset mechanism that activates the starting mode when the voltage drops below a certain threshold. Additionally, the inverter stop mechanism halts the inverter upon detecting any abnormalities in the discharge lamp. Another significant patent involves a ballast with an integrated control circuit that manages the switching elements of both the DC power supply and the inverter circuit. This integration reduces the number of components on the printed circuit board, enhancing efficiency.

Career Highlights

Masahiro Yamanaka is currently employed at Matsushita Electric Works, Ltd., where he has been instrumental in advancing lighting technologies. His work has not only improved the functionality of discharge lamps but has also contributed to energy efficiency in lighting solutions.

Collaborations

Yamanaka has collaborated with several talented individuals in his field, including Kazuhiro Nishimoto and Katsunobu Hamamoto. These collaborations have fostered a creative environment that encourages innovation and the sharing of ideas.

Conclusion

Masahiro Yamanaka's contributions to the field of lighting technology exemplify the spirit of innovation. His patents reflect a deep understanding of electrical engineering and a commitment to improving lighting solutions. Through his work, he continues to inspire future generations of inventors.

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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