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For the Inventor, By the Inventor

Kyoto, Japan

Sadao Yamashita

This inventor holds 41 USPTO granted patents, plus 6 CIPO patents, primarily in Dielectric Waveguide Technology. Top assignees: Murata Manufacturing Co., Ltd., Hitachi Maxell, Limited, Murata Mfg. Co., Ltd.. Active years: 1979-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Sadao Yamashita. Retrieved from https://idiyas.com/inventor/sadao-yamashita

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

USPTO Granted Patents = 41

% Patents Active = 75.6


Average Co-Inventor Count = 3.2

ph-index = 12

Forward Citations = 454(Granted Patents)


Location History:

  • Nagaokakyo, JP (1993)
  • Kyoto-fu, JP (2003 - 2004)
  • Kyoto, JP (1979 - 2012)

Company Filing History:

goldMedal39 out of 13,796 
 
Murata Manufacturing Co., Ltd.
 patents
silverMedal1 out of 1,112 
 
Hitachi Maxell, Limited
 patents
bronzeMedal1 out of 132 
 
Murata Mfg. Co., Ltd.
 patents

Years Active: 1979-2012

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Areas of Expertise:
Dielectric Resonator
Integrated Circuit
Radar Device
Oscillator
High-Frequency Module
Dielectric Filter
Transmission Line
FET Amplifier
Pulse Modulation
Communication Apparatus
DC-DC Converter
Magnetic Recording Medium
41 patents (USPTO):Explore Patents
1. 8284010 - Inductor and DC-DC converter (2012-10-09),
2. 7365603 - FET amplifier, pulse modulation module, and radar device (2008-04-29),
3. 6931246 - Line coupling structure, mixer, and receiving/transmitting apparatus comprised of suspended line and dielectric waveguide (2005-08-16),
4. 6867660 - Line transition device between dielectric waveguide and waveguide, and oscillator, and transmitter using the same (2005-03-15),
5. 6788918 - Transmission line assembly, integrated circuit, and transmitter-receiver apparatus comprising a dielectric waveguide protuding for a dielectric plate (2004-09-07),
6. 6717492 - Planar dielectric integrated circuit with line conversion conductor patterns (2004-04-06),
7. 6642882 - Mixer, radar module, and communication apparatus incorporating the same (2003-11-04),
8. 6614332 - Transmission line, integrated circuit, and transmitter receiver (2003-09-02),
9. 6593874 - Radar for detecting the distance to a target (2003-07-15),
10. 6535072 - Voltage controlled oscillator, voltage controlled oscillator device and radar device (2003-03-18),
11. 6512421 - Gunn diode oscillator with NRD guide (2003-01-28),
12. 6489855 - Line transition device between dielectric waveguide and waveguide, and oscillator, and transmitter using the same (2002-12-03),
13. 6466104 - High-frequency circuit module, filter, duplexer, and communication device (2002-10-15),
14. 6445255 - Planar dielectric integrated circuit (2002-09-03),
15. 6369676 - High-frequency module (2002-04-09),

Title: Sadao Yamashita: Innovator in Inductor and Amplifier Technologies

Introduction

Sadao Yamashita, based in Kyoto, Japan, is a prominent inventor with an impressive portfolio of 41 patents. His contributions to the fields of electronic components and signal amplification have significantly impacted modern technology.

Latest Patents

Among his latest innovations are two noteworthy patents: an inductor and a DC-DC converter, and an FET amplifier along with a pulse modulation module for radar devices. The inductor design features a coil electrode section with both a first and second spiral electrode wound in the same direction and plane, interconnected by a connection electrode. This innovative design, sandwiched between magnetic layers, leads to a low-profile inductor, essential for developing compact DC-DC converters with a streamlined two-layer structure.

In regards to the FET amplifier, it employs a high-frequency signal input and controlling mechanisms based on gate bias signals. The design includes an inverting amplifier and a voltage stabilizing circuit, yielding efficient gate bias voltage to pulse modulate signals. This functionality is pivotal for radar applications, showcasing Yamashita's ingenuity in optimizing high-frequency electronics.

Career Highlights

Sadao Yamashita's career includes significant tenures at reputable firms such as Murata Manufacturing Co., Ltd. and Murata Mfg. Co., Ltd. His work at these organizations has been instrumental in advancing components necessary for modern electronic devices.

Collaborations

Throughout his career, Yamashita has collaborated with distinguished colleagues like Yohei Ishikawa and Koichi Sakamoto. These partnerships have fostered the exchange of innovative ideas, further enhancing the quality and impact of their research and developments.

Conclusion

Sadao Yamashita's dedication to innovation in the fields of inductors, amplifiers, and electronic circuitry has positioned him as a key figure in technology advancement. His extensive patent portfolio and collaborative spirit exemplify the essence of innovation, inspiring future inventors in the electronics sector.

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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