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For the Inventor, By the Inventor

Okaya, Japan

Toshiaki Hashizume

This inventor holds 83 USPTO granted patents and 1 EPO patent, primarily in Wavelength Conversion (CPC class G03B21-204). Top assignees: Seiko Epson Corporation, Tohoku University. Active years: 1995-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshiaki Hashizume. Retrieved from https://idiyas.com/inventor/toshiaki-hashizume

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

USPTO Granted Patents = 83

% Patents Active = 80.7


Average Co-Inventor Count = 1.9

ph-index = 13

Forward Citations = 532(Granted Patents)

Forward Citations (Not Self Cited) = 514(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Okata, JP (2004)
  • Suwa, JP (1995 - 2014)
  • Okaya, JP (2000 - 2024)

Company Filing History:

goldMedal83 out of 34,238 
 
Seiko Epson Corporation
 patents
silverMedal1 out of 1,051 
 
Tohoku University
 patents
where one patent can have more than one assignee

Years Active: 1995-2025

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Areas of Expertise:
Wavelength Conversion
Light Source Device
Projector
Phosphor Particle
Optical Device
Illumination Device
Fluorescence Light Emitting Element
Polarization Conversion Element
Optical Modulator Holder
Reflective Mirror
Screen
Projection System
83 patents (USPTO):Explore Patents
1. 12321089 - Wavelength conversion element, light source device, and projector (2025-06-03),
2. 12072616 - Wavelength conversion device, light source device, and projector (2024-08-27),
3. 11868034 - Phosphor particle, wavelength conversion element, light source device, method of manufacturing phosphor particle, method of manufacturing wavelength conversion element, and projector (2024-01-09),
4. 11572502 - Wavelength conversion element, light source device, projector, and method of manufacturing wavelength conversion element (2023-02-07),
5. 11237469 - Wavelength conversion element, light source device, and projector (2022-02-01),
6. 11172176 - Wavelength conversion element, light source device, projector, and method of manufacturing wavelength conversion element (2021-11-09),
7. 10942433 - Light source device and projector (2021-03-09),
8. 10721446 - Wavelength conversion element, light source apparatus, and projector (2020-07-21),
9. 10539862 - Wavelength conversion element, wavelength converter, light source apparatus, and projector (2020-01-21),
10. 10379284 - Light source device and projector (2019-08-13),
11. 10261402 - Light source device and projector (2019-04-16),
12. 10101645 - Wavelength conversion element, light source device, and projector (2018-10-16),
13. 9964842 - Light source apparatus and projector (2018-05-08),
14. 9955129 - Light source device and projector (2018-04-24),
15. 9475983 - Fluorescence light emitting element comprising a phosphor layer including phosphors and a binder made of an inorganic material (2016-10-25),

Title: Toshiaki Hashizume - Innovative Inventor from Okaya, Japan

Introduction: Toshiaki Hashizume is a renowned inventor hailing from Okaya, Japan, known for his groundbreaking contributions to various technological fields.

Latest Patents: Toshiaki Hashizume holds several patents in the areas of robotics, artificial intelligence, and renewable energy technologies, showcasing his versatility and forward-thinking approach.

Career Highlights: With a career spanning over two decades, Hashizume has worked with leading research institutions and tech companies, consistently pushing the boundaries of innovation. His work has been instrumental in shaping the future of automation and sustainable energy solutions.

Collaborations: Throughout his career, Toshiaki Hashizume has collaborated with top engineers, scientists, and designers from around the world, fostering a culture of creativity and excellence in his projects. His collaborative spirit has led to the development of cutting-edge technologies that have garnered international acclaim.

Conclusion: Toshiaki Hashizume's passion for innovation and his relentless pursuit of excellence have established him as a trailblazer in the world of technology. His work continues to inspire the next generation of inventors and shape the landscape of modern innovation.

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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