Yokohama, Japan

Masaakira Umehara

This inventor holds 16 USPTO granted patents. Top assignee: Ricoh Company, Ltd.. Active years: 1979-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masaakira Umehara. Retrieved from https://idiyas.com/inventor/masaakira-umehara

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


% Patents Active = 100.0

Average Co-Inventor Count = 2.9

ph-index = 11

Forward Citations = 360(Granted Patents)


Location History:

  • Tokyo, JP (1979)
  • Yokohama, JP (1982 - 1993)

Company Filing History:


Years Active: 1979-1993

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16 patents (USPTO):Explore Patents

Title: Masaakira Umehara: Innovator in Optical Information Recording

Introduction

Masaakira Umehara is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of optical information recording, holding a total of 16 patents. His work has advanced the technology used in data storage and retrieval, making him a key figure in his industry.

Latest Patents

Umehara's latest patents include innovative designs for optical information recording mediums. One of his notable inventions is an optical information recording medium composed of a substrate and a recording layer that includes a diarylpolyene compound. This compound is characterized by specific aryl groups and alkyl components, enhancing the medium's performance. Another significant patent involves an optical information recording medium that features a substrate and a recording layer made primarily of an organic dye component. This design maximizes the spectroscopic reflectance at the wavelength used for information recording and reproduction, improving the efficiency of data storage systems.

Career Highlights

Masaakira Umehara is currently associated with Ricoh Company, Ltd., where he continues to innovate in the field of optical technologies. His work has not only contributed to the company's portfolio but has also influenced the broader landscape of optical information technology.

Collaborations

Umehara has collaborated with notable colleagues, including Michiharu Abe and Hideaki Oba. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies in optical information recording.

Conclusion

Masaakira Umehara's contributions to optical information recording have established him as a leading inventor in this field. His innovative patents and collaborations reflect his commitment to advancing technology and improving data storage solutions.

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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