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For the Inventor, By the Inventor

Kunitachi, Japan

Hideya Akashi

USPTO Granted Patents = 15

Average Co-Inventor Count = 4.9

ph-index = 10

Forward Citations = 339(Granted Patents)


Location History:

  • Kodaira, JP (2000)
  • Hadano, JP (1998 - 2001)
  • Hachiouji, JP (2000 - 2003)
  • Kunitachi, JP (2002 - 2007)

Company Filing History:

goldMedal15 out of 42,496 
 
Hitachi, Ltd.
 patents

Years Active: 1998-2007

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15 patents (USPTO):Explore Patents
1. 7206818 - Shared memory multiprocessor system (2007-04-17),
2. 6993633 - Computer system utilizing speculative read requests to cache memory (2006-01-31),
3. 6874053 - Shared memory multiprocessor performing cache coherence control and node controller therefor (2005-03-29),
4. 6839806 - Cache system with a cache tag memory and a cache tag buffer (2005-01-04),
5. 6789173 - Node controller for performing cache coherence control and memory-shared multiprocessor system (2004-09-07),
6. 6636926 - Shared memory multiprocessor performing cache coherence control and node controller therefor (2003-10-21),
7. 6606688 - Cache control method and cache controller (2003-08-12),
8. 6591325 - Method and apparatus of out-of-order transaction processing using request side queue pointer and response side queue pointer (2003-07-08),
9. 6546471 - Shared memory multiprocessor performing cache coherency (2003-04-08),
10. 6516391 - Multiprocessor system and methods for transmitting memory access transactions for the same (2003-02-04),
11. 6438653 - Cache memory control circuit including summarized cache tag memory summarizing cache tag information in parallel processor system (2002-08-20),
12. 6295579 - Parallel processor system including a cache memory subsystem that has independently addressable local and remote data areas (2001-09-25),
13. 6119150 - Message passing distributed shared memory system that eliminates (2000-09-12),
14. 6088770 - Shared memory multiprocessor performing cache coherency (2000-07-11),
15. 5778429 - Parallel processor system including a cache memory subsystem that has (1998-07-07),

Title: Innovations of Inventor Hideya Akashi

Introduction

Hideya Akashi is a prominent inventor based in Kunitachi, Japan. He has made significant contributions to the field of computer systems and multiprocessor technology. With a total of 15 patents to his name, Akashi continues to push the boundaries of innovation.

Latest Patents

One of his latest patents is a shared memory multiprocessor system. This multiprocessor system features a translation lookaside buffer (TLB) in each processor, designed to avoid TLB purge overhead. Each processor node is equipped with a partial main memory and a physical page map table (PPT). The PPT is responsible for storing the mapping between the physical page number of main memory and the virtual page number. In this system, every memory access transaction specifies both the physical address and the virtual page number. Instead of maintaining strict TLB coherency through broadcasting TLB purge transactions, the access destination node checks for a match between the virtual page number specified in the memory access transaction and the virtual page number mapped in the PPT. If they coincide, the memory access is executed; if not, an error message is sent back to the access requesting source.

Another notable patent is a computer system utilizing speculative read requests to cache memory. This cache data control system allows a coherent controller to issue an advanced speculative read request for reading data from a cache data section before checking the cache tag for a cache hit. If a cache hit occurs, the cache data controller returns the data subjected to speculative reading as response data when it receives a read request from the coherent controller.

Career Highlights

Hideya Akashi is currently employed at Hitachi, Ltd., where he continues to innovate and develop advanced technologies. His work has significantly impacted the efficiency and performance of computer systems.

Collaborations

Throughout his career, Akashi has collaborated with notable colleagues, including Toru Shonai and Yuji Tsushima. These collaborations have fostered a creative environment that encourages the development of groundbreaking technologies.

Conclusion

Hideya Akashi's contributions to the field of computer systems and multiprocessor technology are noteworthy. His innovative patents and collaborations with esteemed colleagues highlight his commitment to advancing technology. His work continues to influence the industry and inspire future innovations.

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