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For the Inventor, By the Inventor

Tokyo, Japan

Hiromitsu Umezawa

This inventor holds 11 USPTO granted patents. Top assignees: Fdk Corporation, Other. Active years: 1996-2009.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiromitsu Umezawa. Retrieved from https://idiyas.com/inventor/hiromitsu-umezawa

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

USPTO Granted Patents = 11

% Patents Active = 63.6

Average Co-Inventor Count = 3.1

ph-index = 4

Forward Citations = 34(Granted Patents)


Location History:

  • Toyohashi, JP (1996)
  • Minato-ku, JP (2002 - 2007)
  • Tokyo, JP (2008)
  • Aichi, JP (1999 - 2009)

Company Filing History:

goldMedal10 out of 223 
 
Fdk Corporation
 patents
silverMedal1 out of 834,513 
Other
 patents

Years Active: 1996-2009

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11 patents (USPTO):Explore Patents
1. 7551343 - Magneto-optical device and manufacturing method thereof (2009-06-23),
2. 7336418 - Optical attenuator (2008-02-26),
3. 7280264 - Magneto-optical device (2007-10-09),
4. 7009767 - Polarization separating/synthesizing element and optical device using it (2006-03-07),
5. 6417952 - Faraday rotation angle varying device (2002-07-09),
6. 6288827 - Faraday rotator (2001-09-11),
7. 6108120 - Faraday rotation angle varying apparatus (2000-08-22),
8. 5965287 - Magneto-optical element material and Faraday element using the same (1999-10-12),
9. 5566017 - Material for magneto-optical element and faraday rotator using the same (1996-10-15),
10. 5547613 - Magneto-optical element material formed of magnetic garnet single (1996-08-20),
11. 5521741 - Polarization plane switch and optical switching device using the same (1996-05-28),

Title: Hiromitsu Umezawa: Innovator in Magneto-Optical Devices

Introduction

Hiromitsu Umezawa is a prominent inventor based in Minato-ku, Japan. He has made significant contributions to the field of magneto-optical devices, holding a total of 11 patents. His innovative work has advanced the technology used in optical devices, showcasing his expertise and creativity.

Latest Patents

One of Umezawa's latest patents is for a magneto-optical device and its manufacturing method. This device features a non-magnetic substrate with a magneto-optical crystal embedded in recessed portions, designed to enhance pixel locations. The device includes a partitioning wall that separates the magneto-optical crystals, ensuring a flattened surface for optimal performance. Another notable patent is for an optical attenuator that boasts an increased dynamic range and reduced temperature dependence. This device utilizes a Faraday rotational angle variable mechanism to manipulate light polarization, enhancing its functionality in various applications.

Career Highlights

Throughout his career, Umezawa has worked with notable companies, including FDK Corporation. His work has been instrumental in developing advanced optical technologies that have applications in various industries. His innovative spirit and dedication to research have positioned him as a key figure in the field of magneto-optical devices.

Collaborations

Umezawa has collaborated with esteemed colleagues such as Hirotaka Kawai and Tsugio Tokumasu. These partnerships have fostered a creative environment that has led to groundbreaking advancements in optical technology.

Conclusion

Hiromitsu Umezawa's contributions to the field of magneto-optical devices exemplify his innovative spirit and dedication to advancing technology. His patents reflect a commitment to enhancing optical performance, making him a significant figure 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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