This inventor holds 3 USPTO granted patents. Top assignees: Kabushiki Kaisha Daini Seikosha, Seiko Instruments & Electronics Ltd.. Active years: 1977-1986.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Oyama, JA (1977)
- Tokyo, JP (1980 - 1986)
Company Filing History:
2 out of 349 
1 out of 127 Years Active: 1977-1986
Title: Haruzo Yoshikawa: Innovator in Electronic Metronome Technology
Introduction
Haruzo Yoshikawa is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of electronic metronome technology, holding a total of 3 patents. His innovative designs have enhanced the functionality and usability of metronomes for musicians and performers.
Latest Patents
Yoshikawa's latest patents include an advanced electronic metronome that features a baton driven by a pulse-drive stepper motor. This design is powered by a varying voltage source, allowing the drive circuitry to generate and apply drive pulses to the stepper motor. Each pulse is composed of multiple individual pulses, with a pulse width that varies according to the voltage source and the selected tempo. This ensures that the stepper motor maintains a constant torque-frequency characteristic, even with fluctuations in power source voltage and tempo.
Another notable patent is an electronic metronome equipped with a visual indicator, loudspeaker, and a duty time setting circuit. This circuit allows users to set the visual time of the indicator corresponding to various tempos. As a result, singers and players can easily see the predetermined tempo, enhancing their performance accuracy.
Career Highlights
Throughout his career, Haruzo Yoshikawa has worked with prominent companies such as Kabushiki Kaisha Daini Seikosha and Seiko Instruments & Electronics Ltd. His experience in these organizations has contributed to his expertise in developing innovative electronic devices.
Collaborations
Yoshikawa has collaborated with notable individuals in the industry, including Fumio Morohoshi and Noritoshi Oishi. These partnerships have likely influenced his work and led to advancements in electronic metronome technology.
Conclusion
Haruzo Yoshikawa's contributions to electronic metronome technology have made a lasting impact on musicians and performers. His innovative designs and patents reflect his dedication to enhancing the musical experience.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile