Company Filing History:
2 out of 103 
1 out of 11 
1 out of 7 Years Active: 1985-1999
Title: Hisao Yatsuda: Innovator in Glass Technology
Introduction
Hisao Yatsuda is a notable inventor based in Sagamihara, Japan, recognized for his contributions to glass technology. With a total of four patents to his name, Yatsuda has made significant advancements in the field, particularly in the development of specialized glass materials.
Latest Patents
Yatsuda's latest patents include innovations such as low alpha-ray level glass and a low expansion transparent crystallized glass-ceramic. The low alpha-ray level glass is designed to emit an extremely small amount of alpha-ray while maintaining excellent chemical durability, coefficient of thermal expansion, and hardness. This glass achieves an alpha-ray emission level below 0.02 count/cm².hr by introducing fluorine into a specific SiO₂–B₂O₃–Al₂O₃–R₂O (where R is an alkali metal) system glass. The low expansion transparent crystallized glass-ceramic features a coefficient of thermal expansion within the range of -10 to +10, significantly reducing variation in thermal expansion due to heat treatment conditions. This innovation also boasts improved optical homogeneity and transparency by optimizing the composition of the base glass.
Career Highlights
Throughout his career, Yatsuda has worked with prominent companies, including Kabushiki Kaisha Ohara. His work has focused on enhancing the properties of glass materials, making them suitable for various applications in technology and industry.
Collaborations
Yatsuda has collaborated with notable colleagues such as Naoyuki Goto and Tatsuya Senoo, contributing to the advancement of glass technology through shared expertise and innovative ideas.
Conclusion
Hisao Yatsuda's contributions to glass technology through his patents and collaborations highlight his role as a significant inventor in the field. His work continues to influence advancements in material science and engineering.