Kanagawa, Japan

Masanobu Ajioka

This inventor holds 61 USPTO granted patents, plus 1 CIPO patent and 1 EPO patent, primarily in Biodegradable Polymers (CPC class 5283). Top assignees: Mitsui Toatsu Chemicals, Incorporated, Mitsui Chemicals, Inc., Kansai University. Active years: 1988-2014.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masanobu Ajioka. Retrieved from https://idiyas.com/inventor/masanobu-ajioka

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 = 4.4

ph-index = 19

Forward Citations = 987(Granted Patents)

Forward Citations (Not Self Cited) = 954(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Ohmuta, JP (1988 - 1989)
  • Omuta, JP (1990 - 1992)
  • Yokohama, JP (1990 - 1999)
  • Kanagawa, JP (1992 - 2001)
  • Kanagawa-ken, JP (1996 - 2002)
  • Fukuoka, JP (1989 - 2003)
  • Chiba, JP (2014)

Company Filing History:


Years Active: 1988-2014

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Areas of Expertise:
Biodegradable Polyester
Aliphatic Polyester
Lactic Acid Polymer
Superabsorbent Polymer
Degradable Copolymer
Resin Composition
Degradable Foam
Composite Material
Optical Component
Monofilament
Nucleating Agents
Bioabsorbable Polymer
61 patents (USPTO):Explore Patents

Title: The Innovative Contributions of Masanobu Ajioka

Introduction

Masanobu Ajioka, a prolific inventor based in Kanagawa, Japan, has made significant advancements in the field of polymer materials. With an impressive portfolio of 61 patents, Ajioka's work is paving the way for innovation in various applications, particularly in the development of piezoelectric materials.

Latest Patents

Two of Ajioka's latest patents showcase his expertise and innovative spirit. The first, titled "Piezoelectric Polymer Material, Process for Producing Same, and Piezoelectric Element," presents a novel piezoelectric polymer material that incorporates a helical chiral polymer with a substantial weight average molecular weight ranging from 50,000 to 1,000,000. This composition boasts an impressive piezoelectric constant of 10 pC/N or more at 25°C, along with a crystallinity degree of 40% to 80% and a haze level from 0.5 to 30%.

The second patent, "Process for Producing Aliphatic Polyester Excellent in Stability," describes a method to create an aliphatic polyester characterized by exceptional stability. This process includes solid-phase polymerization of an aliphatic polyester that contains at least 50% of an aliphatic hydroxycarboxylic acid unit, achieved under a flowing gas with a volatile catalyst. The resulting polyester demonstrates a desirable weight average molecular weight between 50,000 and 1,000,000 and exceptional stability during molding and storage.

Career Highlights

Ajioka's distinguished career includes tenures at renowned companies such as Mitsui Toatsu Chemicals, Incorporated and Mitsui Chemicals, Inc. His work in these organizations has been influential in developing advanced materials that meet the demands of modern industries.

Collaborations

Throughout his career, Ajioka has collaborated with notable colleagues like Akihiro Yamaguchi and Kazuhiko Suzuki. These partnerships have fostered an environment of innovation that has led to the development of cutting-edge technologies in polymer science.

Conclusion

Masanobu Ajioka's contributions to the field of polymer technology are substantial and continue to influence advancements in piezoelectric materials. His extensive patent portfolio and collaborative efforts highlight the importance of teamwork in driving innovation. As Ajioka's work progresses, it promises to deliver even greater technological solutions in the future.

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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