Company Filing History:

8 out of 164,108

International Business Machines Corporation

patents

5 out of 2,636

Hitachi Global Storage Technologies Netherlands B.v.

patents

1 out of 4,126

Lenovo (singapore) Pte. Ltd.

patents

4. 1 out of 5

Hitachi Global Technologies

patents

Years Active: 1990-2012

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15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8291190 - Disk drive including a host interface supporting different sizes of data sectors and method for writing data thereto (2012-10-16),

2. 7724457 - Method and system for time-shift based rotational vibration sensing in disk drives (2010-05-25),

3. 6981205 - Data storage apparatus, read data processor, and read data processing method (2005-12-27),

4. 6947243 - Method and system for time-shift based rotational vibration sensing in disk drives (2005-09-20),

5. 6914745 - Head movement controlling based on servo generated speed control values (2005-07-05),

6. 6678109 - Disk drive, servo control unit, and control unit (2004-01-13),

7. 6643087 - Disk drive with improved retract circuit and method (2003-11-04),

8. 6549349 - Adaptive vibration control for servo systems in data storage devices (2003-04-15),

9. 6424476 - Method and apparatus for controlling read and write operations in a storage device (2002-07-23),

10. 6351343 - Arrangement structure of the printed circuit board and the interface cable connector of a magnetic disk drive (2002-02-26),

11. 6122139 - Disk drive rotary actuator system including synchronous counter torque (2000-09-19),

12. 5872677 - Magnetic head position detecting method and magnetic disk apparatus (1999-02-16),

13. 5812338 - Method and apparatus for indicating start of servo information on a (1998-09-22),

14. 5043834 - Actuator locking system of disk unit (1991-08-27),

15. 4894599 - deadbeat control of disk drive actuator (1990-01-16),

Title: Yuzo Nakagawa: Innovator in Disk Drive Technology

Introduction

Yuzo Nakagawa is a prominent inventor based in Hiratsuka, Japan. He has made significant contributions to the field of disk drive technology, holding a total of 15 patents. His innovative work has advanced the capabilities and reliability of data storage systems.

Latest Patents

Among his latest patents is a disk drive that includes a host interface supporting different sizes of data sectors. This method for writing data to a disk drive involves receiving a write command and determining whether the specified rewrite area aligns with the boundaries of large-sized data sectors. The process includes backing up head and tail data sectors in non-volatile memory areas before executing the rewrite. Additionally, he has developed a method and system for time-shift based rotational vibration sensing in disk drives, which analyzes reference bits on a rotating disk to detect vibrations.

Career Highlights

Yuzo Nakagawa has worked with notable companies such as IBM and Hitachi Global Storage Technologies. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in disk drive technology.

Collaborations

He has collaborated with esteemed colleagues, including Naoyuki Kagami and Tetsuo Ueda, to further enhance the development of innovative technologies in the field.

Conclusion

Yuzo Nakagawa's contributions to disk drive technology exemplify his dedication to innovation and excellence. His patents and collaborative efforts continue to influence the industry and pave the way for future advancements.

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