Issued Patents All Time
Showing 25 most recent of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7068459 | Adjusting track density by changing PES algorithm when servo writing a disk drive from spiral tracks | Siri S. Weerasooriya, Tehri S. Lee, Edgar D. Sheh, Wing Ying | 2006-06-27 |
| 7046472 | Method and apparatus for self servowriting of tracks of a disk drive using an observer based on an equivalent one-dimensional state model | Hemant Melkote, Vinay K. Agarwal | 2006-05-16 |
| 7016134 | Using an external spiral servo writer to write spiral tracks to a disk to facilitate writing product servo sectors to the disk | Vinay K. Agarwal, Jack M. Chue | 2006-03-21 |
| 6999263 | Method and apparatus for self servowriting of tracks of a disk drive using a servo control loop having a two-dimensional weighted digital state compensator | Hemant Melkote, Vinay K. Agarwal | 2006-02-14 |
| 6992848 | Using an external spiral servo writer to write spiral reference patterns to a disk to facilitate writing product servo bursts to the disk | Vinay K. Agarwal | 2006-01-31 |
| 6992851 | Method for nonsequentially writing reference spiral servo patterns to a disk to compensate for disk expansion | — | 2006-01-31 |
| 6989954 | Demodulating servo sectors and spiral tracks using common circuitry | Tehri S. Lee, Siri S. Weerasooriya | 2006-01-24 |
| 6977789 | Disk drive for circular self servo writing and spiral self servo writing using prewritten reference servo bursts | — | 2005-12-20 |
| 6965489 | Using an external spiral servo writer to write reference servo sectors and spiral tracks to a disk to facilitate writing product servo sectors to the disk | Tehri S. Lee, Siri S. Weerasooriya | 2005-11-15 |
| 6924961 | Method and apparatus for self servowriting of tracks of a disk drive using an observer based on an equivalent one-dimensional state model | Hemant Melkote, Vinay K. Agarwal | 2005-08-02 |
| 6924960 | Timing compensation in a self-servowriting system | Hemant Melkote | 2005-08-02 |
| 6819518 | Method and apparatus for self servowriting of tracks of a disk drive using a servo control loop having a two-dimensional digital state compensator | Hemant Melkote, Vinay K. Agarwal | 2004-11-16 |
| 6710951 | Phase locked loop employing a fractional frequency synthesizer as a variable oscillator | — | 2004-03-23 |
| 6693760 | Preamplifier circuit configurable to allow simultaneous read and write operations for self-servo writing a disk drive | Mohamad Towfik Krounbi, John Cuda, Jack M. Chue, David Price Turner, Gary L. Dunbar | 2004-02-17 |
| 6600620 | Self-servo writing a disk drive by propagating interleaved sets of timing clocks and servo bursts during alternate time intervals | Mohamad Towfik Krounbi, John Cuda, Jack M. Chue, David Price Turner, Gary L. Dunbar | 2003-07-29 |
| 6519104 | Computer system comprising a host connected to a disk drive employing read channel IC with common port for data and servo | David Price Turner, Richard W. Hull, Vafa James Rakshani | 2003-02-11 |
| 6487032 | Computer system comprising a host connected to a disk drive employing state variable trap registers for providing stored servo and user data state variables to sampled-data channel | Vafa James Rakshani, Richard W. Hull, David Price Turner | 2002-11-26 |
| 6441981 | Disk drive including a recording surface employing servo zones recorded at a channel frequency different from data zones | Richard W. Hull, Vafa James Rakshani, David Price Turner | 2002-08-27 |
| 6411452 | Disk drive employing read error tolerant sync mark detection | — | 2002-06-25 |
| 6292912 | Disk drive having built-in self-test system for characterizing performance of the drive | Patrick J. Lee, Howard Baumer | 2001-09-18 |
| 6278568 | Disk drive employing read channel IC with common port for data and servo | Richard W. Hull, Vafa James Rakshani, David Price Turner | 2001-08-21 |
| 6262857 | Disk drive including a recording surface employing servo zones with banded data zones | Richard W. Hull, Vafa James Rakshani, David Price Turner | 2001-07-17 |
| 6246346 | Storage system employing high-rate code with constraint on run length between occurrences of an influential pattern | Patrick J. Lee, Steven W. McLaughlin | 2001-06-12 |
| 6208477 | Hard disk drive having a built-in self-test for measuring non-linear signal distortion | Patrick J. Lee | 2001-03-27 |
| 6191909 | Polling a preamplifier within a disk drive to remotely determine pre-established parametric values | David Price Turner, Robert E. Caddy, Jr., Michael R. Spaur | 2001-02-20 |