This inventor holds 14 USPTO granted patents and 1 EPO patent. Top assignees: Fujitsu Corporation, Fujitsu Semiconductor Limited, Fujitsu Microelectronics Limited. Active years: 1987-2014.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Sendai, JP (1989)
- Kawasaki, JP (2005 - 2009)
- Tokyo, JP (1987 - 2010)
- Kasugai, JP (2007 - 2014)
Company Filing History:
9 out of 39,374 
2 out of 1,674 
1 out of 467 
Years Active: 1987-2014
Title: Masao Kumagai: Innovator in Control Circuits and D/A Converters
Introduction
Masao Kumagai is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of electronics, particularly in the development of control circuits and digital-to-analog converters. With a total of 14 patents to his name, Kumagai's work has had a lasting impact on the industry.
Latest Patents
Kumagai's latest patents include a control circuit designed for power supply management. This innovative control circuit utilizes first and second switches to regulate the output voltage of the power supply. It features a first control circuit that operates the switches in a complementary manner based on a comparison of a first reference voltage and a feedback voltage. Additionally, he has developed a D/A converter that efficiently converts digital signals into analog voltages using a selection circuit that activates various switch circuits based on the digital input.
Career Highlights
Throughout his career, Masao Kumagai has worked with notable companies such as Fujitsu Corporation and Fujitsu Semiconductor Limited. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking technologies in the electronics sector.
Collaborations
Kumagai has collaborated with esteemed colleagues, including Shinya Udo and Hideto Fukuda. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.
Conclusion
Masao Kumagai's contributions to the field of electronics through his patents and collaborations highlight his role as a key innovator. His work continues to influence advancements in control circuits and D/A converters, showcasing the importance of innovation in technology.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile