This inventor holds 1 USPTO granted patent. Top assignees: Mitsubishi Electric Corporation, Nunome Electric Co., Ltd.. Active years: 2026.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
1 out of 16,618 
1 out of 1 Years Active: 2026
Title: Koji Ishihara: Inventor of an Efficient Coil Device
Introduction
Koji Ishihara is an inventor associated with Nagoya, Japan. His patent work includes a coil and power-conversion design intended to combine compact construction, efficient operation, effective heat dissipation, and lower costs.
Latest Patents
Ishihara is associated with 1 patent: “Coil Device and Power Conversion Device.” The invention describes a transformer with a core group and a winding group. Multiple winding layers pass through closed magnetic circuits formed by multiple cores. Viewed from above, the cores are spaced along the conductors carrying current, while the winding layers are arranged side by side from the inside outward in a direction that intersects the current flow. This configuration is designed to improve heat dissipation while supporting a compact, efficient, and cost-conscious coil device.
Career Highlights
Ishihara’s listed company affiliations include Mitsubishi Electric Corporation and Nunome Electric Co., Ltd. His patent reflects work on transformer and power-conversion technology.
Collaborations
His listed coworkers include Takashi Kumagai and Kazuaki Fukui.
Conclusion
Koji Ishihara’s patent presents a transformer design that arranges its cores and winding layers to address heat management, size, efficiency, and cost.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile