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For the Inventor, By the Inventor

Iwakura, Japan

Katsumi Inukai

This inventor holds 75 USPTO granted patents and 12 EPO patents, primarily in Power Supply Systems (CPC class H02M). Top assignee: Brother Kogyo Kabushiki-Kaisha. Active years: 1999-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Katsumi Inukai. Retrieved from https://idiyas.com/inventor/katsumi-inukai

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

USPTO Granted Patents = 75

% Patents Active = 80.0

 

Average Co-Inventor Count = 1.2

ph-index = 5

Forward Citations = 124(Granted Patents)

Forward Citations (Not Self Cited) = 108(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Nagoya, JP (2001 - 2008)
  • Aichi, JP (2012 - 2013)
  • Ikwakura, JP (2014)
  • Aichi-ken, JP (2014)
  • Iwakura, JP (1999 - 2020)

Company Filing History:

goldMedal75 out of 17,897 
 
Brother Kogyo Kabushiki-Kaisha
 patents

Years Active: 1999-2020

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Areas of Expertise:
Power Supply System
Image Forming Apparatus
Voltage Detection
Energy Efficiency
AC Voltage
Heating Device
Low-Capacity Circuit
Photoconductor
Voltage Conversion
Current Detection
Switching Power Source
Spark Discharge Prevention
75 patents (USPTO):Explore Patents
1. 10819239 - Switched-mode power supply having a load increase circuit (2020-10-27),
2. 10718798 - AC voltage detection device, image forming apparatus, and industrial machine (2020-07-21),
3. 10268151 - Image forming apparatus having photoconductor and method of controlling the same (2019-04-23),
4. 9658681 - Power supply system and image forming apparatus (2017-05-23),
5. 9537419 - Power supply system and image forming apparatus having the same (2017-01-03),
6. 9509219 - Power supply system, image forming apparatus having the power supply system, and control method of the power supply system (2016-11-29),
7. 9488944 - Power saving power supply system having a low-capacity power supply circuit for use in an image forming apparatus (2016-11-08),
8. 9318964 - Power supply system, image forming apparatus having the same, and control method of the same (2016-04-19),
9. 9268268 - Heating device controlling heating switch to perform switching action based on signal (2016-02-23),
10. 9214835 - Power supply system, image forming apparatus having the power supply system, and control method of the power supply system (2015-12-15),
11. 9209621 - Power supply system (2015-12-08),
12. 9174458 - Heating device for detecting state of adjustment portion that adjusts period of connection with alternating current source (2015-11-03),
13. 9151784 - AC voltage detecting circuit and image forming apparatus having the same (2015-10-06),
14. 9130450 - Power supply system, image forming apparatus having the same, and low-capacity power supply circuit (2015-09-08),
15. 9118252 - Switching power source, power-supply system and image forming apparatus (2015-08-25),

Title: Innovations of Katsumi Inukai: A Leader in Power Supply Technology

Introduction: Katsumi Inukai, an accomplished inventor located in Iwakura, Japan, has made significant contributions to the field of electrical engineering with an impressive portfolio of 75 patents. His work primarily focuses on innovative power supply systems and detection devices, pushing the boundaries of technology in the industry.

Latest Patents: Among his latest innovations, Inukai has developed a switched-mode power supply with a load increase circuit. This advanced power supply design includes crucial components such as a transformer, a switching element, and a sophisticated overvoltage protection circuit. The design ensures that operations are adjusted based on varying output voltage levels, enhancing efficiency and safety.

In addition, his work on an AC voltage detection device showcases his expertise in signal processing. This device incorporates a rectifying circuit and a voltage-pulse conversion circuit, allowing for accurate voltage calculations from AC sources. It utilizes electrical insulation methods for signal transmission, ensuring reliable performance in various applications.

Career Highlights: Inukai currently works at Brother Kogyo Kabushiki Kaisha, a well-regarded company known for its commitment to innovation in technology. His role at the company has allowed him to lead pioneering research efforts and develop cutting-edge products that enhance electrical systems.

Collaborations: Throughout his career, Inukai has collaborated with other talented inventors, including Tsuyoshi Maruyama and Masahito Hamaya. These partnerships have contributed to the success of various projects and the development of impactful technologies in the electrical engineering sphere.

Conclusion: Katsumi Inukai's extensive portfolio and innovative spirit have firmly established him as a notable figure in the realm of power supply and electrical detection technology. His dedication to invention and improvement continues to shape the future of electrical engineering, paving the way for new advancements and solutions in the industry.

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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