Yokohama, Japan

Masaaki Hirano

This inventor holds 95 USPTO granted patents and 7 published patent applications, plus 1 CIPO patent and 34 EPO patents, primarily in Optical Fiber Technology (CPC class G02B6-02). Top assignees: Sumitomo Electric Industries, Limited, Renesas Electronics Corporation, Astellas Pharma Gmbh. Active years: 2000-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masaaki Hirano. Retrieved from https://idiyas.com/inventor/masaaki-hirano

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

USPTO Granted Patents = 95 

% Patents Active = 72.6


 

Average Co-Inventor Count = 2.9

ph-index = 11

Forward Citations = 396(Granted Patents)

Forward Citations (Not Self Cited) = 359(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Ibaraki, JP (2000 - 2004)
  • Tsukuba, JP (2005 - 2009)
  • Chuo-ku, JP (2010 - 2011)
  • Yokohama, JP (2002 - 2019)
  • Tokyo, JP (2001 - 2021)
  • Kanagawa, JP (2003 - 2022)
  • Osaka, JP (2022)

Company Filing History:


Years Active: 2000-2026

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Areas of Expertise:
Optical Fiber
Dispensing Device
Automated Analyzer
Optical Fiber Preform
Manufacturing Method
Temperature Measurement
Semiconductor Device
Data Processing System
Optical Communication
Optical Transmission Path
Identification Mark
Automatic Analyzing Device
95 patents (USPTO):Explore Patents

Title: Innovator Spotlight: Masaaki Hirano Revolutionizing Optical Fiber Technology

Introduction:

Masaaki Hirano, a prolific inventor based in Yokohama, Japan, has made significant contributions to the field of optical fiber technology with an impressive portfolio of 89 patents. His groundbreaking work in the development of optical fibers with identification marks has paved the way for enhanced fiber optic communication systems worldwide.

Latest Patents:

1. Optical fiber having identification mark: Hirano's patent introduces an optical fiber with identification marks for precise fiber identification. The design includes specific parameters such as the effective area of the optical transmission medium and the Young's modulus of the primary resin layer to optimize performance.

2. Method of manufacturing optical fiber preform: This patent outlines a method for manufacturing an optical fiber preform with low transmission loss. By controlling the alkali metal element concentration and chlorine concentration in core portions, Hirano has achieved remarkable results in producing high-quality optical fibers.

Career Highlights:

Hirano has an illustrious career history with notable stints at renowned companies such as Sumitomo Electric Industries, Limited, and Astellas Pharma Gmbh. His expertise in optical fiber technology has been a driving force behind the innovative advancements in the industry, solidifying his reputation as a trailblazer in the field.

Collaborations:

Throughout his career, Hirano has collaborated closely with esteemed professionals in the industry, including Tetsuya Haruna and Yoshiaki Tamura. This collaborative spirit has fostered creativity and innovation, leading to the development of cutting-edge technologies in optical fiber manufacturing.

Conclusion:

In conclusion, Masaaki Hirano stands out as a visionary inventor whose pioneering work in optical fiber technology continues to shape the landscape of modern communication systems. With his diverse expertise and collaborative approach, Hirano exemplifies the spirit of innovation and excellence in the field of inventions.

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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