This inventor holds 2 USPTO granted patents and 1 published patent application. Top assignees: Jfe Steel Corporation, Nec Network and Sensor Systems, Ltd.. Active years: 2024-2025.
Company Filing History:
1 out of 1,953 
1 out of 18 Years Active: 2024-2025
Title: Naoki Iizuka: Innovator in Rail Manufacturing and Power Supply Technologies
Introduction
Naoki Iizuka is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the fields of rail manufacturing and power supply technologies. With a total of 2 patents, Iizuka's work has had a notable impact on the industry.
Latest Patents
Iizuka's latest patents include a method for manufacturing rail and a power supply device for microwave tubes. The method for manufacturing rail proposes specific welding conditions that ensure stable weld formation. This innovation addresses the differences in hardness between flash-butt welds and rail base metal, as well as improving deflection in bending tests. The chemical composition of the rail base metal includes C: 0.60 to 1.20 mass %, Si: 0.10 to 1.50 mass %, Mn: 0.10 to 1.50 mass %, and Cr: 0.10 to 1.50 mass %, with the balance being Fe and inevitable impurities. The flash-butt welding process is performed with a controlled amount of welding heat input.
The second patent focuses on a power supply device designed to minimize the start-up time of a microwave tube when the voltage from the power source decreases. This device includes a power supply unit, a power storage unit, and a power supply switching unit. The design aims to avoid increasing the scale of the power storage unit while ensuring efficient operation of the microwave tube.
Career Highlights
Throughout his career, Naoki Iizuka has worked with notable companies such as NEC Network and Sensor Systems, Ltd. and JFE Steel Corporation. His experience in these organizations has contributed to his expertise in rail manufacturing and power supply technologies.
Collaborations
Iizuka has collaborated with several professionals in his field, including Minoru Honjo and Ryo Matsuoka. These collaborations have likely enriched his work and led to further innovations.
Conclusion
Naoki Iizuka is a distinguished inventor whose contributions to rail manufacturing and power supply technologies have made a significant impact. His innovative patents reflect his commitment to advancing these fields.