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For the Inventor, By the Inventor

Mobara, Japan

Syoji Shirai

This inventor holds 15 USPTO granted patents. Top assignees: Hitachi, Ltd., Other. Active years: 1993-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Syoji Shirai. Retrieved from https://idiyas.com/inventor/syoji-shirai

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

USPTO Granted Patents = 15

% Patents Active = 86.7

Average Co-Inventor Count = 2.5

ph-index = 3

Forward Citations = 46(Granted Patents)


Company Filing History:

goldMedal14 out of 42,731 
 
Hitachi, Ltd.
 patents
silverMedal1 out of 834,513 
Other
 patents

Years Active: 1993-2003

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15 patents (USPTO):Explore Patents
1. 6661186 - Color cathode ray tube, driving circuit therefor, color image reproducing device employing the driving circuit, and color image reproducing system including the color image reproducing device (2003-12-09),
2. 6411026 - Color cathode ray tube (2002-06-25),
3. 6404116 - Color cathode ray tube (2002-06-11),
4. 6400105 - Color cathode-ray tube having electrostatic quadrupole lens exhibiting different intensities for electron beams (2002-06-04),
5. 6396221 - Color cathode-ray tube (2002-05-28),
6. 6342758 - Inline type color picture tube (2002-01-29),
7. 6288482 - Color cathode ray tube with reduced drive voltage (2001-09-11),
8. 6184614 - Color cathode ray tube (2001-02-06),
9. 5917275 - Color cathode ray tube (1999-06-29),
10. 5909079 - Color cathode ray tube (1999-06-01),
11. 5814930 - Color cathode ray tube (1998-09-29),
12. 5731657 - Electron gun with cylindrical electrodes arrangement (1998-03-24),
13. 5708322 - Color cathode ray tube with in-line electron gun (1998-01-13),
14. 5572084 - Color cathode ray tube (1996-11-05),
15. 5212423 - Electron gun with lens which changes beam into nonaxisymmetric shape (1993-05-18),

Title: The Innovations of Syoji Shirai

Introduction

Syoji Shirai is a notable inventor based in Mobara, Japan. He has made significant contributions to the field of electronics, particularly in the development of color cathode ray tubes. With a total of 15 patents to his name, Shirai's work has had a lasting impact on image reproduction technology.

Latest Patents

One of Shirai's latest patents includes a color cathode ray tube that features an electron gun with three in-line cathodes. This innovative design incorporates first and second grid electrodes, along with multiple electrodes that focus three electron beams onto a phosphor screen. The patent outlines specific inequalities that must be satisfied for optimal performance, detailing the dimensions and spacing of various components within the tube.

Career Highlights

Throughout his career, Syoji Shirai has worked with prominent companies, including Hitachi, Ltd. His expertise in electronics and imaging technology has positioned him as a key figure in the industry. His patents reflect a deep understanding of the complexities involved in color image reproduction.

Collaborations

Shirai has collaborated with notable coworkers such as Go Uchida and Shinichi Kato. Their combined efforts have contributed to advancements in the field of electronics and imaging systems.

Conclusion

Syoji Shirai's contributions to the development of color cathode ray tubes and related technologies highlight his innovative spirit and technical expertise. His patents continue to influence the industry and pave the way for future advancements in image reproduction technology.

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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