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For the Inventor, By the Inventor

Fukuoka, Japan

Kazunori Hayami

This inventor holds 6 USPTO granted patents and 2 published patent applications. Top assignee: Fujitsu Corporation. Active years: 1992-2016.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazunori Hayami. Retrieved from https://idiyas.com/inventor/kazunori-hayami

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

USPTO Granted Patents = 6 

% Patents Active = 33.3

Average Co-Inventor Count = 2.8

ph-index = 4

Forward Citations = 53(Granted Patents)


Location History:

  • Yokohama, JP (1992)
  • Dazaifu, JP (2001)
  • Fukuoka, JP (2005 - 2016)

Company Filing History:

goldMedal6 out of 39,374 
 
Fujitsu Corporation
 patents

Years Active: 1992-2016

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6 patents (USPTO):Explore Patents
1. 9461542 - Power supply apparatus (2016-10-04),
2. 7595656 - Interface circuit and semiconductor integrated circuit (2009-09-29),
3. 7538626 - Voltage controlled oscillator circuit with different sized shunt transistors (2009-05-26),
4. 6868200 - Wavelength division multiplexing optical transmission apparatus (2005-03-15),
5. 6317249 - Optical modulator outputting an optical signal with a drive voltage signal dependent upon an input signal (2001-11-13),
6. 5088106 - Phase shift circuit and repeater using the same (1992-02-11),

Title: Kazunori Hayami: Innovator in Power Supply and Interface Circuits

Introduction

Kazunori Hayami is a prominent inventor based in Fukuoka, Japan. He has made significant contributions to the field of electrical engineering, particularly in power supply apparatus and interface circuits. With a total of 6 patents to his name, Hayami continues to push the boundaries of innovation in his field.

Latest Patents

One of Hayami's latest patents is a power supply apparatus that includes a power supply section and a control section. The power supply section features a first switch for switching power-supply output, an inductor, and a capacitor that form an LC circuit to resonate the current flowing through the first switch. Additionally, a second switch changes the capacitance of the capacitor. The control section is designed to find a correspondence between the time ratio of a switching pulse of the first switch and a resonance frequency, allowing for precise control of the LC circuit.

Another notable patent is an interface circuit that comprises a driver circuit made up of multiple transistors, a calibration circuit for selecting the on and off states of the transistors, and a terminating resistor connected to the output side of the driver circuit. This innovative design ensures that the combination resistance value matches the characteristic impedance of the transmission line, enhancing performance and reliability.

Career Highlights

Kazunori Hayami is currently employed at Fujitsu Corporation, where he applies his expertise in developing cutting-edge technologies. His work has significantly impacted the efficiency and functionality of power supply systems and interface circuits.

Collaborations

Hayami has collaborated with notable colleagues, including Koichi Kimotsuki and Tatsuo Nagayoshi. Their combined efforts have led to advancements in their respective fields, fostering a collaborative environment that encourages innovation.

Conclusion

Kazunori Hayami is a distinguished inventor whose work in power supply apparatus and interface circuits has made a lasting impact on electrical engineering. His innovative patents and collaborations continue to inspire advancements in 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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