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For the Inventor, By the Inventor

Matsumoto, Japan

Ryoji Katsuma

This inventor holds 11 USPTO granted patents. Top assignee: Seiko Epson Corporation. Active years: 2006-2013.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Ryoji Katsuma. Retrieved from https://idiyas.com/inventor/ryoji-katsuma

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 = 9.1

Average Co-Inventor Count = 1.6

ph-index = 4

Forward Citations = 42(Granted Patents)


Location History:

  • Suwa, JP (2006)
  • Matsumoto, JP (2007 - 2013)

Company Filing History:

goldMedal11 out of 34,268 
 
Seiko Epson Corporation
 patents

Years Active: 2006-2013

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11 patents (USPTO):Explore Patents
1. 8477421 - Screen (2013-07-02),
2. 8405905 - Screen (2013-03-26),
3. 8228603 - Screen and projector (2012-07-24),
4. 8197926 - Screen (2012-06-12),
5. 8169700 - Reflective screen (2012-05-01),
6. 8169697 - Screen unit (2012-05-01),
7. 8023186 - Screen (2011-09-20),
8. 7948679 - Screen and projector (2011-05-24),
9. 7911694 - Screen (2011-03-22),
10. 7188973 - Optical image projector and light source device for optical image projector (2007-03-13),
11. 7052147 - Light source, and projector provided with the light source (2006-05-30),

Title: Ryoji Katsuma: Innovator in Display Technology

Introduction

Ryoji Katsuma is a prominent inventor based in Matsumoto, Japan. He has made significant contributions to the field of display technology, holding a total of 11 patents. His innovative designs focus on enhancing the quality and functionality of screens used in various applications.

Latest Patents

Katsuma's latest patents include a unique screen design that allows images to be displayed according to light incident from an oblique direction. This screen features a body with a reflection surface that incorporates multiple lens elements, each reflecting the incoming light. The design includes a first layer with a higher refractive index than the second air layer, which is strategically placed to optimize light passage. Another notable patent involves a screen that displays images using a plurality of lens trains aligned along virtual reference lines. This configuration helps to suppress image degradation, ensuring a clearer and more vibrant display.

Career Highlights

Ryoji Katsuma is currently employed at Seiko Epson Corporation, where he continues to push the boundaries of display technology. His work has been instrumental in developing advanced screen solutions that cater to modern visual demands.

Collaborations

Katsuma has collaborated with notable colleagues such as Akira Shinbo and Motoyuki Fujimori. Their combined expertise has contributed to the successful development of innovative display technologies.

Conclusion

Ryoji Katsuma's contributions to display technology through his patents and collaborations highlight his role as a leading inventor in the field. His work continues to influence the way images are presented on screens, paving the way for future innovations.

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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