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For the Inventor, By the Inventor

Tokyo, Japan

Masahiro Ishiyama

This inventor holds 58 USPTO granted patents and 1 published patent application, primarily in Communication Systems (CPC class G06F). Top assignees: Kabushiki Kaisha Toshiba, Toshiba Memory Corporation, Kabushiki Kaisha Sega Enterprises. Active years: 1999-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masahiro Ishiyama. Retrieved from https://idiyas.com/inventor/masahiro-ishiyama

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

USPTO Granted Patents = 58 

% Patents Active = 48.3

Average Co-Inventor Count = 3.1

ph-index = 17

Forward Citations = 1,497(Granted Patents)

Forward Citations (Not Self Cited) = 1,481(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Tokyo-To, JP (2005 - 2006)
  • Tokyo, JP (1999 - 2009)
  • Kanagawa, JP (2000 - 2019)
  • Kawasaki, JP (2008 - 2020)
  • Kawasaki Kanagawa, JP (2020)

Company Filing History:

goldMedal49 out of 53,262 
 
Kabushiki Kaisha Toshiba
 patents
silverMedal8 out of 2,955 
 
Toshiba Memory Corporation
 patents
bronzeMedal1 out of 145 
 
Kabushiki Kaisha Sega Enterprises
 patents
4. 1 out of 1,413 
 
Yokogawa Electric Corporation
 patents
where one patent can have more than one assignee

Years Active: 1999-2020

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Areas of Expertise:
Mobile IP
Communication Apparatus
Memory System
Network Management
Data Processor
Control Method
Wireless Communication
IP Address Management
RFID Tag Device
Security Protocol
Position Identifier
Content Distribution
58 patents (USPTO):Explore Patents
1. 10747666 - Memory system (2020-08-18),
2. 10530772 - Communication apparatus (2020-01-07),
3. 10528464 - Memory system and control method (2020-01-07),
4. 10402864 - Data processor, content distribution system, and communication apparatus (2019-09-03),
5. 10365857 - Memory system (2019-07-30),
6. 10278233 - Communication apparatus and communication method (2019-04-30),
7. 10187818 - Communication apparatus and communication method (2019-01-22),
8. 10091767 - Communication apparatus and communication method (2018-10-02),
9. 9999079 - Communication device, communication control method, and non-transitory computer readable medium (2018-06-12),
10. 9473317 - Communication apparatus and communication method (2016-10-18),
11. 9456316 - Communication apparatus and communication method (2016-09-27),
12. 9282522 - Communication apparatus and communication method (2016-03-08),
13. 8959208 - Equipment set generation support apparatus and method (2015-02-17),
14. 8805557 - Control system, control device, and control method (2014-08-12),
15. 8588247 - Relay device and remote startup system (2013-11-19),

Title: Masahiro Ishiyama - Innovator in Memory Systems

Introduction

Masahiro Ishiyama is a prominent inventor based in Tokyo, Japan, recognized for his significant contributions to the field of memory systems. With an impressive portfolio of 58 patents, he has established himself as a leading figure in the technology sector, particularly in innovations related to data storage and memory management.

Latest Patents

Ishiyama's latest patents showcase his expertise in memory systems. One of his notable inventions, titled "Memory System," describes a system that includes non-volatile memory, a buffer memory, and a controller designed to improve data integrity. The controller is configured to manage incoming write commands from a host while ensuring that data stored in the buffer is only written to non-volatile memory under specific conditions, such as a flush request or a power shutdown event.

Another significant patent, "Memory System and Control Method," outlines a memory system with non-volatile memory containing multiple memory dies that operate in parallel. The controller in this system manages logical areas for storing data and parity information efficiently, ensuring that both data portions and calculated parities are organized strategically across different physical blocks.

Career Highlights

Masahiro Ishiyama has had a rewarding career, working for notable companies such as Kabushiki Kaisha Toshiba and Toshiba Memory Corporation. His involvement with these leading firms has enabled him to play a pivotal role in advancing memory technology, putting his patented ideas into practice.

Collaborations

Throughout his career, Ishiyama has collaborated with talented professionals, including coworkers Atsushi Inoue and Toshio Okamoto. These partnerships have fostered innovation and contributed to the successful realization of his patented inventions, showcasing the power of teamwork in the technological landscape.

Conclusion

Masahiro Ishiyama's work in memory systems exemplifies the impact of innovation in technology. With 58 patents to his name, his contributions continue to shape the future of data storage solutions. As he progresses in his career, further advancements can be anticipated, reflecting the ongoing evolution of memory 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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