This inventor holds 15 USPTO granted patents. Top assignees: Hoya Corporation, Hoya Optics, Inc., Raychem Limited. Active years: 1978-2001.
Location History:
- Hidaka, JP (1978)
- Hidakamachi, JP (1980)
- Fremont, CA (US) (1989)
- Tokyo, JP (1985 - 2001)
Company Filing History:
14 out of 2,565 
1 out of 3 
1 out of 1,259 Years Active: 1978-2001
Title: Hisayoshi Toratani: Innovator in Glass Technology
Introduction
Hisayoshi Toratani is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of glass technology, holding a total of 15 patents. His innovative work has led to advancements in optical materials and information recording technologies.
Latest Patents
One of Hisayoshi Toratani's latest patents is for a light polarizing glass containing copper particles and the process for its preparation. This invention involves a light polarizing glass article that comprises a base glass and metallic copper particles dispersed within it. The metallic copper particles have aspect ratios ranging from about 2:1 to 15:1, and the base glass is selected from silicate, borosilicate, borate, and phosphate glasses containing at least one reductant element. The preparation process includes heating a batch of glass with copper and halogen constituents to develop copper halide particles, elongating the glass at specific temperatures, and reducing copper halide particles to produce metallic copper particles. Additionally, he has developed disc substrates for information recording discs and magnetic discs. These substrates consist of SiO₂—Al₂O₃—RO (where RO represents a divalent metal) glasses, which exhibit high specific elastic modulus and heat resistance, enabling thinner magnetic discs and improved recording density.
Career Highlights
Hisayoshi Toratani has worked with notable companies such as Hoya Corporation and Raychem Limited. His experience in these organizations has allowed him to refine his expertise in glass technology and contribute to various innovative projects.
Collaborations
Throughout his career, Toratani has collaborated with talented individuals, including Xuelu Zou and Hiroaki Yanagita. These partnerships have fostered a creative environment that has led to groundbreaking advancements in their respective fields.
Conclusion
Hisayoshi Toratani's contributions to glass technology and his innovative patents highlight his role as a leading inventor in the industry. His work continues to influence advancements in optical materials and information recording technologies.