Location History:
- Futtsu, JP (1998)
- Tokyo, JP (2015 - 2019)
Company Filing History:
8 out of 1,098 
2 out of 3,542 
1 out of 36,499 
Years Active: 1998-2019
Title: Innovations of Hatsuhiko Oikawa in Resistance Spot Welding
Introduction
Hatsuhiko Oikawa is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of resistance spot welding, holding a total of 10 patents. His innovative methods have advanced the technology used in welding high tensile steel sheets, enhancing efficiency and quality in manufacturing processes.
Latest Patents
Oikawa's latest patents focus on a resistance spot welding method that involves superposing multiple steel sheets, including high tensile steel. By utilizing an inverter DC type spot welding power supply, he has developed a technique that controls the conduction time of current pulses, the intervals between these pulses, and the weld current applied. This method optimizes weld conditions and minimizes spatter during the welding process. Another notable patent describes a pulsation process that clamps a sheet assembly of overlapped steel sheets and performs multiple repetitions of current passing and stopping, followed by a continuous current pass process. This innovative approach ensures a broad suitable current range, even when using an inverter DC power supply.
Career Highlights
Throughout his career, Oikawa has worked with leading companies in the steel industry, including Nippon Steel & Sumitomo Metal Corporation and Nippon Steel Corporation. His experience in these organizations has allowed him to refine his expertise in welding technologies and contribute to advancements in the field.
Collaborations
Oikawa has collaborated with notable colleagues such as Yasunobu Miyazaki and Hideki Hamatani. Their combined efforts have further propelled innovations in resistance spot welding techniques.
Conclusion
Hatsuhiko Oikawa's contributions to resistance spot welding have significantly impacted the manufacturing industry. His innovative methods and patents continue to influence welding practices, ensuring higher quality and efficiency in the production of steel components.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.