Hara-mura, Japan

Masatoshi Yonekubo

This inventor holds 104 USPTO granted patents and 7 published patent applications and 4 EPO patents, primarily in Virtual Image Displays (CPC class G02B27-0172). Top assignees: Seiko Epson Corporation, Kabushiki Kaisha Suwa Seikosha, Public University Corporation Suwa University of Science Foundation. Active years: 1985-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masatoshi Yonekubo. Retrieved from https://idiyas.com/inventor/masatoshi-yonekubo

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

USPTO Granted Patents = 104 

% Patents Active = 77.9

 

Average Co-Inventor Count = 2.2

ph-index = 13

Forward Citations = 727(Granted Patents)

Forward Citations (Not Self Cited) = 704(Dec 10, 2025)


Inventors with similar research interests:

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Location History:

  • Suwa, JP (1985 - 2003)
  • Hana-mura, JP (2008 - 2014)
  • Hara, JP (2015 - 2019)
  • Suwa-gun, JP (2019 - 2022)
  • Nagano, JP (1988 - 2023)
  • Hara-mura, JP (2002 - 2023)
  • Suwa-gun Hara-mura, JP (2021 - 2023)
  • Nagano-ken, JP (1997 - 2024)
  • Hara-mura Suwagun, JP (2024)

Company Filing History:


Years Active: 1985-2026

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Areas of Expertise:
Display Device
Optical System
Virtual Image
Head-Mounted Display
Image Display
Light Source
Optical Element
Image Light Generation
Light Guiding
Electro-Optical Device
Display Module
Optical Scanner
104 patents (USPTO):Explore Patents

Masatoshi Yonekubo is an accomplished inventor and patent holder based in Hara-mura, Japan. With an impressive number of 100 patents to his name, Yonekubo has made significant contributions in the field of display technology.

Recently, Yonekubo has developed two groundbreaking inventions in the area of display modules and devices. The first patent is for a display module that incorporates an image light generation device, a light-guiding member, and diffraction elements. This unique configuration allows for the sequential transmission of image light through various reflection and deflection surfaces within the module, ultimately resulting in the formation of an exit pupil. Such an innovation has the potential to enhance the quality and visual experience of display devices.

In his second patent, Yonekubo introduces a virtual image display device. This invention comprises an image light generation device, a projection optical system, a folding mirror, a semi-transmissive mirror, and a concave surface mirror. By strategically aligning the optical axis of the projection optical system and arranging the display region of the image light generation device at inclined angles, Yonekubo has created a virtual image display device that offers immersive visual experiences.

During his career, Yonekubo has worked with renowned companies such as Seiko Epson Corporation and Seiko Epson Kabushiki Kaisha. In these organizations, he collaborated with talented colleagues such as Takashi Takeda and Mitsutaka Ide to bring his innovative ideas to fruition.

Masatoshi Yonekubo's advancements in display technology have undoubtedly contributed to the development of more immersive and high-quality visual experiences. Through his extensive patent portfolio and collaborations with industry leaders, Yonekubo continues to push the boundaries of innovation in this field.

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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