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For the Inventor, By the Inventor

Kawasaki, Japan

Masaru Nakahara

This inventor holds 8 USPTO granted patents. Top assignee: Fujitsu Corporation. Active years: 1994-2000.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masaru Nakahara. Retrieved from https://idiyas.com/inventor/masaru-nakahara

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

USPTO Granted Patents = 8

% Patents Active = 100.0

Average Co-Inventor Count = 5.1

ph-index = 6

Forward Citations = 483(Granted Patents)


Company Filing History:

goldMedal8 out of 39,378 
 
Fujitsu Corporation
 patents

Years Active: 1994-2000

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8 patents (USPTO):Explore Patents
1. 6011764 - Optical disk and optical disk apparatus (2000-01-04),
2. 5982886 - Unauthorized use preventing method for optical disks, optical disk (1999-11-09),
3. 5875247 - System for decrypting encrypted software (1999-02-23),
4. 5777965 - Optical disk having an erased-state indicator and optical disk apparatus (1998-07-07),
5. 5752009 - Recording medium for electronic publications including multiple format (1998-05-12),
6. 5617393 - Optical disk having an erased-state indicator and optical disk apparatus (1997-04-01),
7. 5418852 - Unauthorized use prevention method for optical disks, optical disk (1995-05-23),
8. 5357431 - Character string retrieval system using index and unit for making the (1994-10-18),

Title: The Innovative Contributions of Masaru Nakahara

Introduction

Masaru Nakahara, a prominent inventor based in Kawasaki, Japan, has made significant contributions to the field of optical technology. With a remarkable portfolio that includes eight patents, he has played a crucial role in advancing optical disk technology, making it more secure and efficient.

Latest Patents

Among Nakahara's latest patents are groundbreaking inventions focused on optical disks and their apparatus. One notable patent involves an optical disk featuring a user-accessible area with multiple blocks and flag data recorded on the disk. This flag data indicates whether each block is in an erased state, ensuring better data management. Another innovative patent introduces a method to prevent unauthorized use of recording media. It involves comparing information retrieved from a user-inaccessible area with that of a legally produced copy, providing a robust mechanism for safeguarding digital content.

Career Highlights

Nakahara's technological prowess is evident through his tenure at Fujitsu Corporation, where he has contributed to the development of cutting-edge optical technologies. His expertise in this niche domain has garnered him recognition within the engineering community, highlighting his dedication to enhancing the functionality and security of optical disks.

Collaborations

Throughout his career, Nakahara has collaborated with several esteemed professionals, including his coworkers Kenichi Utsumi and Satoshi Itami. These partnerships have fostered an environment of innovation, driving the collective effort to create solutions that push the boundaries of optical technology.

Conclusion

Masaru Nakahara's contributions to the realm of optical technology are invaluable. His inventive spirit and collaboration with industry experts continue to pave the way for advancements in data management and security. As the field evolves, Nakahara's work will undoubtedly influence future innovations in optical disks and related technologies.

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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