Location History:
- Ibaraki, JP (1985)
- Tsuchiura, JP (2001 - 2005)
- Tokyo, JP (2007)
Company Filing History:
4 out of 42,485 
1 out of 1,641 
1 out of 1 Years Active: 1985-2007
Title: Hiroaki Doi: Innovator in Electronic Circuit Devices and Cooling Systems
Introduction
Hiroaki Doi is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of electronic circuit devices and cooling systems. With a total of four patents to his name, Doi's work reflects a commitment to innovation and technological advancement.
Latest Patents
One of Doi's latest patents is an electronic circuit device designed with reduced breaking and cracking. This invention includes a substrate with a front surface for mounting electronic circuit elements and a reverse surface. It features an electrically conductive terminal member connected to the electronic circuit element, along with a lead frame that extends perpendicular to the thickness direction. The sealing resin partially covers the electronic circuit element, substrate, and lead frame, while ensuring that part of the terminal member remains uncovered.
Another notable patent is a cooling system for motors, which addresses thermal fatigue failure due to temperature cycles. This system controls the operation of the cooling motor fan based on the temperature difference from the operation start temperature of the power converter. This innovation effectively suppresses the expansion of the temperature range, enhancing the reliability of the cooling system.
Career Highlights
Hiroaki Doi has worked with reputable companies such as Hitachi, Ltd. and Hitachi Chemical Company, Ltd. His experience in these organizations has contributed to his expertise in developing advanced electronic and cooling technologies.
Collaborations
Doi has collaborated with notable colleagues, including Tetsuo Kumazawa and Yasuo Miyadera. Their combined efforts have furthered the development of innovative solutions in their respective fields.
Conclusion
Hiroaki Doi's contributions to electronic circuit devices and cooling systems demonstrate his innovative spirit and technical expertise. His patents reflect a dedication to improving technology and addressing industry challenges. Doi's work continues to influence advancements in electronic engineering and thermal management.
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.