This inventor holds 4 USPTO granted patents. Top assignee: Canon Kabushiki Kaisha. Active years: 1996-2012.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Kanagawa-ken, JP (1996)
- Chigasaki, JP (1999 - 2012)
Company Filing History:
Years Active: 1996-2012
Title: Tsutomu Nishikawa: Innovator in Charging Technology
Introduction
Tsutomu Nishikawa is a notable inventor based in Chigasaki, Japan. He has made significant contributions to the field of charging technology, holding a total of 4 patents. His work focuses on enhancing the efficiency and safety of battery charging systems.
Latest Patents
One of his latest patents is a charging device with backflow prevention. This innovative device prevents charging current from flowing back into the system even when a battery pack remains mounted after charging is complete. This feature helps in preventing the deterioration of the batteries within the pack. The device utilizes a circuit that includes a semiconductor switch to generate DC power for charging. A backflow prevention diode is strategically connected between the semiconductor switch and the battery pack. Once charging is completed, a secondary charge control circuit lowers the DC voltage input to the diode, ensuring it remains lower than the battery pack's voltage.
Another significant patent is the combination battery charger and battery-driven power supply. This device features a charging circuit that performs charging actions on a secondary battery, along with a power supplying circuit that delivers power to a connected load device. It includes a mode change-over circuit that allows selection between a charge mode and a discharge mode. In charge mode, the charging circuit operates to charge the secondary battery, while in discharge mode, the power supplying circuit delivers power from the battery to the load device.
Career Highlights
Tsutomu Nishikawa is associated with Canon Kabushiki Kaisha, a leading company in imaging and printing technology. His work at Canon has allowed him to develop innovative solutions that enhance battery performance and safety.
Collaborations
He has collaborated with notable coworkers, including Isao Hayashi and Takashi Narasawa, contributing to the advancement of technology in their field.
Conclusion
Tsutomu Nishikawa's contributions to charging technology through his patents reflect his commitment to innovation and improvement in battery systems. His work continues to influence the industry positively.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile