Machida, Japan

Iwao Tsugawa

This inventor holds 5 USPTO granted patents, plus 1 CIPO patent. Top assignee: Fujitsu Corporation. Active years: 1989-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Iwao Tsugawa. Retrieved from https://idiyas.com/inventor/iwao-tsugawa

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 = 4.5

ph-index = 4

Forward Citations = 73(Granted Patents)


Location History:

  • Machida, JP (1989 - 1992)
  • Kawasaki, JP (1997 - 1998)

Company Filing History:


Years Active: 1989-1998

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5 patents (USPTO):Explore Patents

Title: Iwao Tsugawa: Innovator in Optical Recording Technology

Introduction

Iwao Tsugawa is a prominent inventor based in Machida, Japan. He has made significant contributions to the field of optical recording technology. With a total of 5 patents to his name, Tsugawa has focused on developing innovative solutions to prevent illegal copying of optical media.

Latest Patents

Tsugawa's latest patents include advancements in optical recording mediums that feature non-volatile identification codes. One of his notable inventions involves an optical recording medium where a medium identification code is recorded as a nonvolatile mark. This mark is formed through irreversible changes in a recording film, such as magnetization characteristic changes, deformation, and the formation of a hole. These innovations aim to enhance security and prevent illegal copying of optical recording mediums.

Career Highlights

Iwao Tsugawa is currently associated with Fujitsu Corporation, where he continues to push the boundaries of optical recording technology. His work has been instrumental in developing methods that ensure the integrity and security of optical media.

Collaborations

Throughout his career, Tsugawa has collaborated with notable colleagues, including Kenichi Utsumi and Yasuyuki Goto. These collaborations have fostered a creative environment that has led to significant advancements in their field.

Conclusion

Iwao Tsugawa's contributions to optical recording technology highlight his innovative spirit and dedication to preventing illegal copying. His work continues to influence the industry and pave the way for future advancements.

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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