Location History:
- Ibaraki, JP (1987 - 1991)
- Toride, JP (1991)
Company Filing History:
Years Active: 1987-1991
Title: Hajime Doi: Innovator in Magnetic Disc Technology
Introduction
Hajime Doi is a prominent inventor based in Ibaraki, Japan. He has made significant contributions to the field of magnetic disc technology, holding a total of 5 patents. His work focuses on improving the efficiency and effectiveness of disc cleaning mechanisms.
Latest Patents
One of Hajime Doi's latest patents is a cleaning sheet for a magnetic disc. This invention discloses a disc cartridge that comprises a cartridge case and a disc set rotatably housed within it. The cleaning sheets are secured to the inside of the cartridge case, and they are designed to have a disc side surface layer composed almost entirely of ultrafine fibers with a diameter of less than 10 micrometers. This innovative design produces an excellent cleaning effect on the disc, significantly reducing errors during recording and reproducing operations. Another notable patent is a disk cartridge with improved disk cleaning. This invention features a cartridge case that receives a magnetic disk and includes a cleaning sheet fixed by spot or line welding to the inner surfaces of the cartridge case. The design minimizes the density of welding spots or lines in areas that experience the most pressure from pressing pads on the recording/reproducing apparatus.
Career Highlights
Hajime Doi is currently employed at Hitachi Maxell, Limited, where he continues to develop innovative solutions in the field of magnetic disc technology. His work has been instrumental in enhancing the performance and reliability of magnetic discs.
Collaborations
Hajime Doi has collaborated with notable colleagues such as Fujio Matsumoto and Kunio Mizushima. Their combined expertise has contributed to advancements in the technology surrounding magnetic discs.
Conclusion
Hajime Doi's contributions to magnetic disc technology through his innovative patents have significantly impacted the industry. His work continues to pave the way for advancements in disc cleaning mechanisms, ensuring better performance and reliability in recording and reproducing operations.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.