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For the Inventor, By the Inventor

Takasaki, Japan

Ryushi Shimokawa

This inventor holds 11 USPTO granted patents. Top assignees: Hitachi, Ltd., Konishiroku Photo Industry Co., Ltd., Hitachi Microcomputer System, Ltd.. Active years: 1979-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Ryushi Shimokawa. Retrieved from https://idiyas.com/inventor/ryushi-shimokawa

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

USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 4.2

ph-index = 6

Forward Citations = 72(Granted Patents)


Location History:

  • Fuchu, JP (1979 - 1981)
  • Fuchu-shi, Tokyo, JP (1981)
  • Takasaki, JP (1985 - 2003)

Company Filing History:

goldMedal9 out of 42,731 
 
Hitachi, Ltd.
 patents
silverMedal3 out of 1,252 
 
Konishiroku Photo Industry Co., Ltd.
 patents
bronzeMedal1 out of 64 
 
Hitachi Microcomputer System, Ltd.
 patents
4. 1 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1979-2003

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11 patents (USPTO):Explore Patents
1. 6661594 - Signal processing circuit and information recording/reproducing apparatus using the same, and method for optimizing coefficients of equalizer circuit (2003-12-09),
2. 5818655 - Signal processing circuit and information recording/reproducing (1998-10-06),
3. 5805024 - Phase lock loop system including a primary phase lock loop apparatus and (1998-09-08),
4. 5774470 - Digital signal processor, error detection method, and recording medium (1998-06-30),
5. 4888561 - Amplifier and display using the former (1989-12-19),
6. 4755768 - Amplifier and display using the former (1988-07-05),
7. 4492450 - Camera with microprocessor (1985-01-08),
8. 4269494 - Battery level warning device (1981-05-26),
9. 4268136 - Camera having an automatic exposure control means (1981-05-19),
10. 4198142 - Power supply resetting circuit for camera (1980-04-15),
11. 4180797 - Digital comparator constructed of IIL (1979-12-25),

Title: Ryushi Shimokawa: Pioneering Innovations in Signal Processing

Introduction: Ryushi Shimokawa from Takasaki, Japan, is a prolific inventor with 11 patents to his name. His groundbreaking work in signal processing has left a lasting impact on the field of magnetic recording/reproducing apparatus.

Latest Patents: Shimokawa's recent patents include a signal processing circuit and information recording/reproducing apparatus that feature innovative techniques for optimizing coefficients of equalizer circuits. These patents showcase his expertise in developing advanced technologies for data processing and storage.

Career Highlights: Throughout his career, Shimokawa has worked with prominent companies such as Hitachi, Ltd. and Konishiroku Photo Industry Co., Ltd. His contributions to these organizations have been instrumental in driving technological advancements in the industry.

Collaborations: Shimokawa has collaborated with esteemed professionals in the field, including Kazuo Shiozawa and Michio Yagi. Together, they have worked on cutting-edge projects that have pushed the boundaries of signal processing technology.

Conclusion: Ryushi Shimokawa's dedication to innovation and his ability to overcome technical challenges make him a true pioneer in the world of inventions. His patents and collaborations serve as a testament to his exceptional talent and drive to create transformative solutions in signal processing.

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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