Location History:
- Hiromachi, JP (1984 - 1995)
- Tokyo, JP (1985 - 2002)
- Nerima-ku, JP (2000 - 2002)
Company Filing History:
32 out of 613 
5 out of 2,002 
4 out of 1,432 
Years Active: 1984-2025
Areas of Expertise:
Title: Innovations of Hiroyuki Koike in Electronic Timepieces
Introduction
Hiroyuki Koike is a prominent inventor based in Tokyo, Japan. He holds an impressive portfolio of 40 patents, primarily in the field of electronic timepieces. His work has significantly influenced the advancement of timekeeping technology, particularly in creating devices that resist external shocks and ensure accuracy.
Latest Patents
Koike's latest patents showcase his innovative designs and engineering expertise. One notable patent is the "Electronic timepiece with calendar device," which features a calendar advancement mechanism that can quickly correct dates. This invention utilizes a date dial advancement transducer activated by a 24-hour switch, along with a date gear train employing a Geneva wheel for stabilizing the date dial. Additionally, he developed the "Electronic timepiece with calendar month-end non-correction device," addressing specific functionality in electronic watches.
Career Highlights
Hiroyuki Koike has made remarkable contributions to the watchmaking industry through his tenure at notable companies. He has had significant roles at Sankyo Company, Limited and Citizen Watch Company, Ltd., where he significantly contributed to the development and innovation of electronic timepieces. His work not only showcases creativity but also highlights a dedication to improving user experience in timekeeping.
Collaborations
Throughout his career, Koike has had the opportunity to collaborate with esteemed colleagues such as Sadao Ishihara and Hiroaki Yanagisawa. These partnerships have fostered an environment of shared knowledge and creativity, further enhancing the innovation of electronic timepieces.
Conclusion
Hiroyuki Koike stands out as a key figure in the world of electronic watch invention. With his extensive patent portfolio and collaborative spirit, he continues to influence the industry and inspire future innovations in timekeeping technology. His commitment to creating effective and resilient electronic timepieces underscores the importance of innovation in enhancing everyday tools.