Company Filing History:
1 out of 2,636 
1 out of 17 Years Active: 2011-2012
Title: Yuuji Ishima: Innovator in Magnetic Disk Technology
Introduction
Yuuji Ishima is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of magnetic disk technology, holding 2 patents that showcase his innovative approach to data storage solutions.
Latest Patents
One of his latest patents is for a magnetic disk unit. This invention provides a magnetic disk unit capable of attaining miniaturization, lower cost, lighter weight, lower profile, and higher density. According to one embodiment, only a carriage and a spindle motor among respective constituent components of a hard disk drive (HDD) are securely attached to a support plate made of a hard metal material higher in rigidity than a shroud. All the constituent components of the HDD, except the carriage and the spindle motor, such as a voice coil motor, a ramp, a latch lever, and an HDD connector, are attached to a shroud that is small in wall thickness and lighter in weight, formed of a resin material such as plastics.
Another significant patent is for a magnetic disk apparatus. This invention includes a magnetic recording medium, a magnetic head assembly having a magnetic head that reads and writes data on the magnetic recording medium, and a motor coil assembly that rotationally drives a spindle motor rotation body. In this design, plural motor coils are arranged on a circumference around the rotation center of the spindle motor rotation body, ensuring equal intervals in the circumferential direction, within a stator base that surrounds the spindle motor rotation body.
Career Highlights
Yuuji Ishima has worked with prominent companies in the technology sector, including Hitachi Global Storage Technologies and Hitachi Global Technologies. His experience in these organizations has allowed him to refine his skills and contribute to advancements in magnetic disk technology.
Collaborations
Throughout his career, Yuuji has collaborated with notable professionals such as Kazuyoshi Hanada and Masaru Muranishi. These collaborations have further enriched his work and innovations in the field.
Conclusion
Yuuji Ishima's contributions to magnetic disk technology through his patents and career experiences highlight his role as an influential inventor. His work continues to impact the data storage industry significantly.