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For the Inventor, By the Inventor

Kobe, Japan

Toshiaki Shirosaka

This inventor holds 10 USPTO granted patents. Top assignee: Dx Antenna Company, Limited. Active years: 1991-2007.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshiaki Shirosaka. Retrieved from https://idiyas.com/inventor/toshiaki-shirosaka

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

USPTO Granted Patents = 10

% Patents Active = 20.0

Average Co-Inventor Count = 2.5

ph-index = 6

Forward Citations = 189(Granted Patents)


Location History:

  • Toyono, JP (1991)
  • Kobe, JP (2004 - 2007)

Company Filing History:

goldMedal10 out of 59 
 
Dx Antenna Company, Limited
 patents

Years Active: 1991-2007

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10 patents (USPTO):Explore Patents
1. 7277063 - Variable directivity antenna and variable directivity antenna system using the antennas (2007-10-02),
2. 7205955 - Antenna (2007-04-17),
3. 7084829 - Signal receiving system (2006-08-01),
4. 7071891 - Antenna apparatus (2006-07-04),
5. 6965353 - Multiple frequency band antenna and signal receiving system using such antenna (2005-11-15),
6. 6933907 - Variable directivity antenna and variable directivity antenna system using such antennas (2005-08-23),
7. 6914558 - Variable directivity antenna apparatus and receiver system using such antenna apparatus (2005-07-05),
8. 6774863 - Antenna system (2004-08-10),
9. 5006858 - Microstrip line antenna with crank-shaped elements and resonant (1991-04-09),
10. 4988963 - High frequency coaxial line coupling device (1991-01-29),

Title: Toshiaki Shirosaka: Innovator in Antenna Technology

Introduction

Toshiaki Shirosaka is a prominent inventor based in Kobe, Japan. He has made significant contributions to the field of antenna technology, holding a total of 10 patents. His innovative designs have advanced the capabilities of variable directivity antennas, which are crucial for various communication applications.

Latest Patents

Shirosaka's latest patents include a variable directivity antenna and a variable directivity antenna system utilizing folded dipole antenna elements. These elements are arranged in parallel, spaced closer than half the wavelength employed. The design allows for received signals from the front to be in phase at the combiner inputs, while signals from the back are 180° out of phase. Additionally, his antenna design incorporates transmission lines that are both parallel and perpendicular to a reflector, optimizing radiation impedance and characteristic impedance for enhanced performance.

Career Highlights

Toshiaki Shirosaka is currently associated with Dx Antenna Company, Limited, where he continues to innovate in antenna technology. His work has been instrumental in developing advanced communication systems that rely on efficient signal transmission and reception.

Collaborations

Shirosaka has collaborated with notable colleagues such as Kiyotaka Tatekawa and Shingo Fujisawa. Their combined expertise has contributed to the successful development of cutting-edge antenna technologies.

Conclusion

Toshiaki Shirosaka's contributions to antenna technology exemplify his innovative spirit and dedication to advancing communication systems. His patents reflect a deep understanding of the complexities involved in antenna design, making him a key figure in this field.

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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