This inventor holds 2 USPTO granted patents and 1 EPO patent. Top assignees: Citizen Holdings Company, Ltd., Citizen Watch Company, Ltd.. Active years: 2013-2015.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
2 out of 450 
1 out of 2,004 
Years Active: 2013-2015
Title: Innovations of Tatsuo Sumida
Introduction
Tatsuo Sumida is a notable inventor based in Iruma, Japan. He has made significant contributions to the field of electronic timepieces, holding a total of 2 patents. His work reflects a deep understanding of both mechanical and electronic engineering.
Latest Patents
Sumida's latest patents include an innovative electronic timepiece that features a unique lubricating apparatus. This apparatus supports the axes of a stator guide and a rotor, fitting into an opening of a stator as separate components. By integrating these components into a cylindrically shaped opening of constant diameter in a bottom plate, a bearing is configured that aligns the central axis of the stator with the rotor's rotational axis with high precision. This design simplifies the structure of the lubricating apparatus and enables the use of a bearing-less stator in electronic timepieces.
Another significant patent is for a radio-controlled timepiece that enhances reception sensitivity. This invention includes an antenna core made of magnetic material, formed as a single integrated body with coiled and extension portions. The design also incorporates additional magnetic cores and magnetism-collection members, all assembled with a main plate made of non-magnetic material. This configuration improves the reception performance of the timepiece, showcasing Sumida's innovative approach to enhancing electronic devices.
Career Highlights
Throughout his career, Tatsuo Sumida has worked with prominent companies such as Citizen Holdings Company, Ltd. and Citizen Watch Company, Ltd. His experience in these organizations has allowed him to develop and refine his inventions, contributing to advancements in timekeeping technology.
Collaborations
Sumida has collaborated with notable coworkers, including Kazuo Sakamoto and Tadashi Yasuoka. Their combined expertise has likely played a role in the successful development of his innovative patents.
Conclusion
Tatsuo Sumida's contributions to the field of electronic timepieces demonstrate his inventive spirit and technical prowess. His patents reflect a commitment to enhancing the functionality and performance of timekeeping devices.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile