Company Filing History:

3 out of 719

Maxtor Corporation

patents

2 out of 27,375

Matsushita Electric Industrial Co., Ltd.

patents

1 out of 52,711

Kabushiki Kaisha Toshiba

6. 1 out of 832,680

Other

patents

Years Active: 1998-2013

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9 patents (USPTO):Sort by Forward Citations

Abstract keywords

1. 8565052 - Methods, systems, and computer program products for correcting repeatable runout (2013-10-22),

2. 7468859 - Voice coil motor effective resistance determination (2008-12-23),

3. 7436616 - Current pulsing for unloading (2008-10-14),

4. 7082010 - Method and apparatus for reducing seek acoustics in a disk drive using feedback during large current transitions (2006-07-25),

5. 7054099 - Methods and systems for moving a read/write head to a velocity and position where it is useful to switch from a deceleration phase to a settling phase of a seek operation (2006-05-30),

6. 7009807 - Methods and systems for improved deceleration control for a disk drive (2006-03-07),

7. 6697913 - Seek queue for improved disk drive performance (2004-02-24),

8. 6515819 - Adaptive update of seek time prediction data (2003-02-04),

9. 5836135 - Drainage track (1998-11-17),

Title: Innovations and Contributions of Fred R Hansen

Introduction

Fred R Hansen is a notable inventor based in Boulder, Colorado. He has made significant contributions to the field of technology, particularly in the areas of disk drive devices and tracking systems. With a total of nine patents to his name, Hansen's work has had a lasting impact on the industry.

Latest Patents

Hansen's latest patents include innovative methods and systems for correcting repeatable runout. These methods involve receiving an open loop tracking signal, obtaining a discrete Fourier transform of the squared signal, and iteratively constructing a correction signal to enhance tracking accuracy. Another significant patent focuses on determining a correction factor for a voice coil motor in disk drive devices. This method involves measuring actuator velocity during a seek operation to estimate velocity as a function of back EMF.

Career Highlights

Throughout his career, Hansen has worked with prominent companies such as Maxtor Corporation and Matsushita Electric Industrial Co., Ltd. His experience in these organizations has contributed to his expertise in developing advanced technologies.

Collaborations

Hansen has collaborated with notable individuals in the field, including Brian Kenneth Tanner and Joseph R Hagan. These partnerships have fostered innovation and the development of cutting-edge solutions.

Conclusion

Fred R Hansen's contributions to technology through his patents and collaborations highlight his role as a significant inventor in the industry. His work continues to influence advancements in disk drive technology and tracking systems.

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