Kanagawa, Japan

Tadashi Yasunaga

This inventor holds 47 USPTO granted patents, primarily in Magnetic Recording Media. Top assignees: Fuji Photo Film Company, Limited, Fujifilm Corporation. Active years: 1987-2009.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tadashi Yasunaga. Retrieved from https://idiyas.com/inventor/tadashi-yasunaga

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


% Patents Active = 68.1

Average Co-Inventor Count = 2.4

ph-index = 6

Forward Citations = 148(Granted Patents)


Location History:

  • Kanagawa, JP (1987 - 1996)
  • Kanagawa-ken, JP (2004 - 2008)
  • Odawara, JP (1996 - 2009)

Company Filing History:


Years Active: 1987-2009

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Areas of Expertise:
Magnetic Transfer
Recording Medium
Signal Processing
Master Information Carrier
Manufacturing Method
High-Density Recording
Thin-Film Technology
Magnetic Recording Apparatus
Cobalt Thin Film
Ferromagnetic Metal
Protective Layer
Vacuum Evaporation
47 patents (USPTO):Explore Patents

Title: Spotlight on Inventor Tadashi Yasunaga

Introduction:

Tadashi Yasunaga, a prolific inventor hailing from Kanagawa, Japan, has left a significant mark in the field of technology with a remarkable 47 patents to his name. His innovative contributions have revolutionized various aspects of magnetic recording and reproduction technology.

Latest Patents:

1. Amplitude servo pattern: Yasunaga has developed an amplitude servo pattern that enhances servo control precision by utilizing reproduced amplitude while minimizing noise. This pattern features servo burst signals arranged in burst bit strings along the track width direction with specific phase differences for improved track direction accuracy.

2. Master information carrier for magnetic transfer: Yasunaga's master information carrier boasts an embossed pattern on its surface, comprising protruding and recessed portions that represent the signal pattern for transfer. With embossed patterns of 300 nm or shorter in bit length, this carrier optimizes surface area distribution for effective signal transfer.

Career Highlights:

Having worked at renowned companies like Fujifilm Corporation (formerly Fuji Photo Film Company, Limited), Yasunaga's expertise and dedication have fueled his inventive endeavors. His patents reflect his commitment to advancing magnetic recording and reproducing apparatus technologies for enhanced performance and reliability.

Collaborations:

Yasunaga's collaborations with esteemed colleagues such as Masakazu Nishikawa and Akio Yanai have further enriched his innovative journey. Through shared expertise and teamwork, they have contributed to the advancement of magnetic technology applications in various industries.

Conclusion:

Inventor Tadashi Yasunaga's trailblazing work in magnetic recording and reproduction technology stands as a testament to his ingenuity and commitment to technological advancement. His patents and collaborations underscore his significant contributions to the field, leaving a lasting impact on innovation 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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