Katsumi Yamamura

Title: Katsumi Yamamura: Innovator in Electronic Timepieces and Calculators

Introduction

Katsumi Yamamura is a notable inventor based in Suwa, Japan. He has made significant contributions to the field of electronics, particularly in the development of electronic timepieces and compact calculators. With a total of 2 patents, his work showcases innovative solutions that enhance everyday technology.

Latest Patents

Yamamura's latest patents include an electronic timepiece and a compact electronic calculator. The electronic timepiece features a quartz crystal oscillator that produces a timekeeping standard signal, which is divided by a transformer means made of silicon gate complementary MOS transistor elements. The output is applied to a drive circuit connected to a digital display formed of liquid crystal elements. Time correction is facilitated by two switches, allowing users to select and correct the displayed digits. The compact electronic calculator is designed with an input circuit defined by lead switches mounted beneath an operative surface, which can be actuated by a manually manipulatable permanent magnet. This calculator also includes a calculating circuit formed from LSI elements, a liquid crystal display, and a battery power source.

Career Highlights

Yamamura is associated with Kabushiki Kaisha Suwa Seikosha, where he has contributed to various innovative projects. His work has been instrumental in advancing electronic devices that are both functional and user-friendly.

Collaborations

Yamamura has collaborated with notable coworkers, including Kouji Kakizawa and Minoru Hosokawa. Their combined expertise has fostered a creative environment that encourages innovation and development in electronic technologies.

Conclusion

Katsumi Yamamura's contributions to electronic timepieces and calculators reflect his dedication to innovation in technology. His patents demonstrate a commitment to enhancing user experience through practical and efficient designs.