Company Filing History:
3 out of 45 
2 out of 99 
1 out of 1 Years Active: 1996-1998
Title: Kiyoshi Yokokawa: Innovator in Quartz Glass Technology
Introduction
Kiyoshi Yokokawa is a prominent inventor based in Annaka, Japan. He has made significant contributions to the field of quartz glass technology, holding a total of 4 patents. His innovative work focuses on the development and manufacturing processes of large-sized quartz glass tubes and preforms, which are essential in various optical applications.
Latest Patents
Yokokawa's latest patents include a large-sized quartz glass tube and a large-scale quartz glass preform. One of his notable inventions is a quartz glass tube produced by mechanically processing a natural or synthetic quartz glass mother material. This tube has an outer diameter ranging from 50 to 300 mm, an outer to inner diameter ratio of 1 to 7, and a thickness of 10 mm or more with a thickness error of 2% or less. Another significant patent involves a method for manufacturing a large-scale quartz glass preform that integrates a core glass rod for optical fibers using a rod-in-tube technique. Additionally, he has developed a method for fabricating a large-sized primary treated quartz glass tube by perforating a cylindrical quartz glass mother material using a hot carbon drill press, followed by etching and washing.
Career Highlights
Throughout his career, Kiyoshi Yokokawa has worked with notable companies such as Heraeus Quarzglas GmbH and Shin-Etsu Quartz Products Co., Ltd. His expertise in quartz glass technology has positioned him as a key figure in the industry, contributing to advancements that enhance the performance and efficiency of optical components.
Collaborations
Yokokawa has collaborated with esteemed professionals in the field, including Masaaki Aoyama and Gerhart Vilsmeier. These collaborations have further enriched his work and have led to innovative solutions in quartz glass manufacturing.
Conclusion
Kiyoshi Yokokawa's contributions to quartz glass technology through his patents and collaborations highlight his role as a leading inventor in this specialized field. His work continues to influence advancements in optical applications, showcasing the importance of innovation in material science.