Osaka, Japan

Keiji Matsusaka

This inventor holds 36 USPTO granted patents and 2 EPO patents, primarily in Imaging Optical Systems. Top assignees: Konica Minolta Opto, Inc., Konica Minolta Advanced Layers, Inc., Konica Minolta, Inc.. Active years: 2006-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Matsusaka. Retrieved from https://idiyas.com/inventor/keiji-matsusaka

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


% Patents Active = 58.3


Average Co-Inventor Count = 1.9

ph-index = 9

Forward Citations = 168(Granted Patents)


Location History:

  • Osaka, JP (2006 - 2015)
  • Kokubunji, JP (2021)

Company Filing History:


Years Active: 2006-2021

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Areas of Expertise:
Imaging Lens
Optical System
Image Pickup Device
Wide-Angle Lens
Variable Power
Digital Apparatus
Mobile Terminal
Image Capturing
Zoom Optical System
Single-Focus
Image-Taking Lens
Variable Magnification
36 patents (USPTO):Explore Patents

Title: Innovator Spotlight: Keiji Matsusaka

Introduction: Keiji Matsusaka, an esteemed inventor based in Osaka, Japan, holds a remarkable portfolio of 36 patents. His innovations primarily focus on advanced optical systems for various imaging technologies.

Latest Patents: Among his latest patents is a sophisticated lens unit designed for imaging apparatuses and mobile devices. This lens unit incorporates an imaging optical system and a lens barrel that securely holds it. The optical system features three key lenses: the first lens provides positive refractive power, while the second lens has an aspherical shape on at least one surface. The third lens, also with an aspherical surface, exhibits negative refractive power and possesses an inflection point that does not intersect with the optical axis. Additionally, Matsusaka has developed an imaging apparatus and digital devices that include an optical system made of five lens elements. These elements can display various refractive powers and comply with specific conditional expressions that enhance their performance in imaging applications.

Career Highlights: Throughout his career, Keiji Matsusaka has made significant contributions while working at reputable companies like Konica Minolta Opto, Inc. and Konica Minolta Advanced Layers, Inc. His expertise in optical technology and imaging systems has positioned him as a leading figure in the field.

Collaborations: Matsusaka has collaborated with talented individuals such as Yusuke Hirao and Yasunari Fukuta. Their combined efforts in research and development have advanced the company’s capabilities in creating innovative imaging solutions.

Conclusion: With his extensive work in optics and imaging technology, Keiji Matsusaka continues to inspire innovation. His numerous patents reflect a commitment to pushing the boundaries of what is possible in imaging systems for various applications, marking him as a noteworthy inventor 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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