This inventor holds 1 USPTO granted patent. Top assignees: Citizen Chiba Precision Co., Ltd., Citizen Watch Co., Ltd.. Active years: 2026.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
1 out of 1 
1 out of 5 Years Active: 2026
Title: Makoto Doi: Inventor of Rotor and Brushless Motor Technology.
Introduction
Makoto Doi is an inventor associated with Yachiyo, Japan. His patent work includes a rotor design intended for use in brushless motors.
Latest Patents
Doi’s listed patent is titled “Rotor, Brushless Motor, and Method for Manufacturing Rotor.” It describes a rotor that turns around a defined centerline and includes a columnar magnet and a rotating shaft. A cylindrical part of the shaft covers part of the magnet’s outer circumference, and the two surfaces are joined. The magnet’s end surface and the shaft’s end surface are not joined. The patent presents a structural approach to assembling a rotor and its shaft. Doi is credited with 1 patent.
Career Highlights
Doi’s professional affiliations include Citizen Chiba Precision Co., Ltd. and Citizen Watch Co., Ltd. His patent reflects work in rotor construction and brushless motor technology.
Collaborations
Doi’s listed coworkers include Kazunari Ogata and Takehiro Kariya.
Conclusion
Makoto Doi’s recorded invention focuses on a rotor structure for brushless motor applications, alongside professional affiliations with two Citizen companies.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile