This inventor holds 13 USPTO granted patents. Top assignees: Seiko Instruments Inc, Kabushiki Kaisha Daini Seikosha, Seiko Instruments & Electronics Ltd.. Active years: 1977-1993.
Location History:
- Tokyo, JA (1977)
- Tokyo, JP (1978 - 1993)
Company Filing History:
6 out of 2,903 
4 out of 349 
3 out of 127 Years Active: 1977-1993
Title: Nobuo Tsukada: Innovator in Ultrasonic Motor Technology
Introduction
Nobuo Tsukada is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of ultrasonic motor technology, holding a total of 13 patents. His innovative designs have paved the way for advancements in various applications, particularly in the realm of portable devices.
Latest Patents
One of Tsukada's latest inventions is the Micro-traveller with ultrasonic motor. This device features two ultrasonic motors, each responsible for driving a respective wheel. The ultrasonic motor consists of a vibrating member, a moving member, and a pressure regulating member. The driving circuit sends signals to activate the ultrasonic motor, allowing the moving member to turn the driving wheel. This enables the traveller to move freely in any direction. Each ultrasonic motor receives specific signals, facilitating versatile movement.
Another notable patent is the standing-wave type ultrasonic motor and timepiece. This motor utilizes flexible standing-wave components, with protuberances positioned at nearly every other intermediate position of the loops and nodes. The moving member is pressed against these protuberances, allowing for frictional drive. This design not only enables forward and reverse motion but also reduces size, stabilizes performance, and improves efficiency. Additionally, an analog-type electronic timepiece is created using display means driven by the standing-wave type ultrasonic motor, resulting in a compact and thin design.
Career Highlights
Throughout his career, Nobuo Tsukada has worked with esteemed companies such as Seiko Instruments Inc. and Kabushiki Kaisha Daini Seikosha. His experience in these organizations has contributed to his expertise in developing cutting-edge technologies.
Collaborations
Tsukada has collaborated with notable individuals in the field, including Eiichi Matsuura and Masao Kasuga. These partnerships have further enhanced his innovative capabilities and broadened the impact of his inventions.
Conclusion
Nobuo Tsukada's contributions to ultrasonic motor technology exemplify his innovative spirit and dedication to advancing engineering solutions. His patents reflect a commitment to improving device functionality and efficiency, making him a significant figure in the world of inventions.