This inventor holds 3 USPTO granted patents. Top assignee: Daicel Chemical Industries, Ltd.. Active years: 1983-1992.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Himeji, JP (1983)
- Kobe, JP (1988 - 1992)
Company Filing History:
Years Active: 1983-1992
Title: The Innovations of Shinji Tokuhara
Introduction
Shinji Tokuhara is a notable inventor based in Kobe, Japan. He has made significant contributions to the field of optical data storage, holding a total of 3 patents. His work focuses on enhancing the capacity and efficiency of memory disks, which are crucial for data storage technologies.
Latest Patents
One of Tokuhara's latest patents is for a large-capacity memory disk. This invention utilizes a methyl methacrylate copolymer as the disk substrate, which consists of 99 to 20 percent by weight methyl methacrylate and 1 to 80 percent by weight of a monomer copolymerizable with methyl methacrylate. This innovative approach aims to improve the performance and storage capacity of optical disks. Another significant patent is for a large diameter optical disk substrate made of polycarbonate. This disk substrate is designed for high-density information recording and is produced through injection molding. It features an average molecular weight ranging from 14,000 to 22,000, a thickness between 1.0 to 2.0 mm, and a circular recording area defined by two concentric circles with radii of 40 to 170 mm. The birefringence of the substrate within the recording area is less than 25 mm and is uniformly distributed, enhancing the quality of data retrieval.
Career Highlights
Shinji Tokuhara is currently employed at Daicel Chemical Industries, Ltd., where he continues to innovate in the field of optical data storage. His work has been instrumental in advancing the technology used in memory disks, making them more efficient and capable of storing larger amounts of data.
Collaborations
Throughout his career, Tokuhara has collaborated with notable colleagues, including Takeshi Moriwaki and Yoshio Onizawa. These collaborations have contributed to the development of cutting-edge technologies in the optical storage industry.
Conclusion
Shinji Tokuhara's contributions to the field of optical data storage through his innovative patents have significantly impacted the industry. His work continues to pave the way for advancements in memory disk technology, showcasing the importance of innovation in data storage solutions.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile