Kanagawa, Japan

Hiroaki Doushita

This inventor holds 21 USPTO granted patents, primarily in Magnetic Recording Media. Top assignee: Fuji Photo Film Company, Limited. Active years: 1992-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroaki Doushita. Retrieved from https://idiyas.com/inventor/hiroaki-doushita

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


% Patents Active = 90.5

Average Co-Inventor Count = 2.5

ph-index = 5

Forward Citations = 86(Granted Patents)


Location History:

  • Odawara, JP (2004)
  • Kanagawa, JP (1992 - 2006)

Company Filing History:


Years Active: 1992-2006

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Areas of Expertise:
Optical Information Recording
Magnetic Recording Medium
Magnetic Tape
Reproduction Process
Backcoat Layer
Ferromagnetic Particles
Controlled Hc
Magnetic Flux
Tape Cassette
Substrate Improvement
21 patents (USPTO):Explore Patents

Title: Hiroaki Doushita: Innovator in Optical and Magnetic Recording Technologies

Introduction: Hiroaki Doushita is a prominent inventor based in Kanagawa, Japan, known for his significant contributions to optical and magnetic recording media. With a total of 21 patents, Doushita has made strides in enhancing data storage technologies, culminating in innovative designs that improve performance and efficiency.

Latest Patents: Two of Doushita's remarkable patents include an optical information recording medium and a magnetic recording medium. The optical information recording medium features a substrate with precise specifications and is designed for high-density data storage. It includes a light reflecting layer, a recording layer that utilizes a dye activated by laser beams, an adhesive layer, and a protective cover layer. This recording medium is characterized by its low surface roughness, ensuring optimal performance. The magnetic recording medium comprises a non-magnetic support and a magnetic layer featuring ferromagnetic metal powder with unique characteristics that enhance data integrity and reliability.

Career Highlights: Doushita is a key contributor at Fuji Photo Film Company, Limited, where he has dedicated his skills to advancing the company's research and development initiatives. His innovative approach has placed him at the forefront of optical and magnetic recording technologies, shaping the future of data storage.

Collaborations: Hiroaki Doushita collaborates with fellow inventors Masatoshi Takahashi and Kiyomi Ejiri. Together, they share a commitment to pushing the boundaries of technology and developing groundbreaking solutions that address contemporary challenges in data storage.

Conclusion: Hiroaki Doushita exemplifies the spirit of innovation in the field of data storage. With his extensive patent portfolio and collaborative efforts, he continues to inspire advancements in optical and magnetic recording technologies, contributing to a future where efficient data storage is possible.

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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