logo

For the Inventor, By the Inventor

Miyagi, Japan

Yuji Iwaki

This inventor holds 16 USPTO granted patents. Top assignee: Sony Corporation. Active years: 1992-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yuji Iwaki. Retrieved from https://idiyas.com/inventor/yuji-iwaki-u784e2jm

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 16

% Patents Active = 62.5

Average Co-Inventor Count = 2.8

ph-index = 5

Forward Citations = 98(Granted Patents)


Company Filing History:

goldMedal16 out of 58,145 
 
Sony Corporation
 patents

Years Active: 1992-2012

Loading Chart...
16 patents (USPTO):Explore Patents
1. RE43454 - Disc cartridge including an inner shell formed by severing a molded portion and a flanged thin-walled section (2012-06-04),
2. 7284254 - Disk cartridge and disk recording medium device having shutter members (2007-10-16),
3. 7127732 - Disc cartridge including an inner shell formed by severing a molded portion and a flanged thin-walled section (2006-10-24),
4. 7103900 - Disc cartridge with crank-shaped dust intrusion prohibiting unit (2006-09-05),
5. 7103898 - Method for producing inner shell for a disc cartridge (2006-09-05),
6. 7057854 - Disk cartridge having a dust-proof shutter (2006-06-06),
7. 7017170 - Disk cartridge with inner shell supported for rotation in guide groove formed in an upper shell (2006-03-21),
8. 6944875 - Disc cartridge with shutter overlapping gap having labyrinth shaped portion spaced to have a recessed dust deposition portion (2005-09-13),
9. 6282058 - Belt-type tape cartridge with increased magnetic tape capacity (2001-08-28),
10. 5995344 - Disc cartridge having design parameters of a recording and/or (1999-11-30),
11. 5969917 - Disc cartridge with liners uplifted by lifter units having comb shaped (1999-10-19),
12. 5739993 - Shutter for disk cartridge including integrally formed display surface (1998-04-14),
13. 5570782 - Disk cartridge case (1996-11-05),
14. 5531322 - Storage case (1996-07-02),
15. 5293995 - Storage case for disc-shaped recording media contained within (1994-03-15),

Title: Yuji Iwaki: Innovator in Disc Cartridge Technology

Introduction

Yuji Iwaki is a prominent inventor based in Miyagi, Japan, known for his significant contributions to disc cartridge technology. With a total of 16 patents to his name, Iwaki has made notable advancements in the design and functionality of disc cartridges used in various recording mediums.

Latest Patents

Iwaki's latest patents include innovative designs for disc cartridges. One of his inventions is a disc cartridge that features an inner shell formed by severing a molded portion and a flanged thin-walled section. This design allows for the rotation of the inner shell, which in turn operates shutter members to open or close an aperture in the main cartridge body. Another significant patent involves a disk cartridge that accommodates a disk-like recording medium, enhancing the dust-proof properties of the joint portions of shutter members, thereby preventing dust and smudges from entering the disk compartment.

Career Highlights

Iwaki has spent a considerable part of his career at Sony Corporation, where he has been instrumental in developing cutting-edge technologies related to optical and magnetic disks. His work has not only improved the functionality of disc cartridges but has also contributed to the overall advancement of recording devices in the industry.

Collaborations

Throughout his career, Iwaki has collaborated with notable colleagues such as Shuichi Kikuchi and Manabu Obata. These collaborations have fostered an environment of innovation and creativity, leading to the development of groundbreaking technologies in the field.

Conclusion

Yuji Iwaki's contributions to disc cartridge technology have significantly impacted the industry, showcasing his expertise and innovative spirit. His patents reflect a commitment to enhancing the functionality and reliability of recording mediums, solidifying his reputation as a leading inventor in this field.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Loading…