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For the Inventor, By the Inventor

Hyogo, Japan

Toshio Ishizaki

This inventor holds 100 USPTO granted patents and 2 published patent applications and 2 EPO patents, primarily in Radio Frequency Technology (CPC class H01P1-203). Top assignees: Matsushita Electric Industrial Co., Ltd., Panasonic Corporation. Active years: 1992-2013.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshio Ishizaki. Retrieved from https://idiyas.com/inventor/toshio-ishizaki

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

USPTO Granted Patents = 100 

% Patents Active = 79.0


Average Co-Inventor Count = 3.9

ph-index = 19

Forward Citations = 1,362(Granted Patents)

Forward Citations (Not Self Cited) = 1,304(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Kyoto, JP (1995)
  • Hyougo, JP (2002)
  • Kobe, JP (1992 - 2008)
  • Hyogo, JP (1997 - 2013)

Company Filing History:

goldMedal90 out of 27,375 
 
Matsushita Electric Industrial Co., Ltd.
 patents
silverMedal10 out of 16,454 
 
Panasonic Corporation
 patents

Years Active: 1992-2013

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Areas of Expertise:
Radio Frequency Amplifier
High-Frequency Filter
Communication Apparatus
Dielectric Resonator
Antenna Duplexer
Spread-Spectrum Heating
Laminated RF Device
Transmitting/Receiving Switch
Electronic Component Module
Balanced High-Frequency Circuit
Multilayer Electronic Component
Diplexer
100 patents (USPTO):Explore Patents
1. 8558622 - Radio frequency power amplifier (2013-10-15),
2. 8525594 - Radio frequency amplifier circuit (2013-09-03),
3. 8451073 - Laminated RF device with vertical resonators having stack arrangement of laminated layers including dielectric layers (2013-05-28),
4. 8334733 - Left-handed filter for use in mobile phone provided with wide band and improved propagation characteristics (2012-12-18),
5. 8330085 - Spread-spectrum high-frequency heating device (2012-12-11),
6. 8248190 - Resonator and filter using the same (2012-08-21),
7. 8222975 - Transmission line resonator, high-frequency filter using the same, high-frequency module, and radio device (2012-07-17),
8. 7911350 - Alcohol detection system (2011-03-22),
9. 7629862 - Composite duplexer (2009-12-08),
10. 7479847 - Filter using piezoelectric resonator (2009-01-20),
11. 7324493 - 3-frequency branching circuit, branching circuit and radio communication equipment (2008-01-29),
12. 7274570 - Electronic component mounting board, electronic component module, method of manufacturing electronic component mounting board, and communications equipment (2007-09-25),
13. 7224240 - Balanced high-frequency filter, antenna duplexer, balanced high-frequency circuit and communication apparatus (2007-05-29),
14. 7176768 - Balanced high-frequency device and balanced high-frequency circuit using the same (2007-02-13),
15. 7138888 - Filter using piezoelectric resonator (2006-11-21),

Title: Toshio Ishizaki: A Leading Innovator in Radio Frequency Technology

Introduction

Toshio Ishizaki, based in Hyogo, Japan, is a prominent inventor known for his significant contributions to radio frequency technology. With an impressive portfolio of 100 patents, Ishizaki's work has advanced the field of telecommunications and electronics.

Latest Patents

Among his most recent innovations are two groundbreaking patents focused on radio frequency amplifiers. The first patent for a "Radio frequency power amplifier" describes an innovative design that includes a transistor for amplifying radio frequency signals. It features an input matching circuit and an output matching circuit, alongside a reactance control circuit that optimizes performance at specific frequencies. The second patent, titled "Radio frequency amplifier circuit," aims to enhance output and efficiency. This invention incorporates multiple harmonic processing circuits, positioned strategically to ensure superior radio frequency amplification.

Career Highlights

Ishizaki has had a distinguished career, having worked with renowned companies such as Matsushita Electric Industrial Co., Ltd. and Panasonic Corporation. His experiences at these leading organizations have allowed him to hone his expertise in developing cutting-edge electronic components and systems that address contemporary communication challenges.

Collaborations

Throughout his career, Ishizaki has collaborated with fellow innovators such as Toru Yamada and Hideaki Nakakubo. These partnerships have enabled the exchange of ideas and fostered a work environment conducive to the birth of innovative technologies.

Conclusion

Toshio Ishizaki's legacy in the realm of radio frequency technology is marked by his prolific patent output and impactful collaborations. As he continues to innovate, his contributions will likely shape the future of telecommunications, emphasizing the importance of research and development in the 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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