Issued Patents All Time
Showing 25 most recent of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8891200 | Impedance mitigation of a microactuator conductive joint | John C. Purkett, Robert A. Alt, KarWei Koay | 2014-11-18 |
| 7843661 | Controller with fractional position algorithm | Chris Settje, Thomas Zirps | 2010-11-30 |
| 7554761 | Open loop Ka calibration with low frequency compensation | LingZhi Yang, Sandeep D. Sequeira | 2009-06-30 |
| 7477476 | Trajectory control profile with non-zero initial velocity | LingZhi Yang | 2009-01-13 |
| 7092184 | Monitoring a sensor's output using a target window that is based on a longitudinal offset's position-dependent indicator | Christopher Settje, Steven Koldewyn, Reed D. Hanson, Timothy F. Ellis | 2006-08-15 |
| 6986098 | Method of reducing miscorrections in a post-processor using column parity checks | Alan D. Poeppelman, Kevin G. Christian | 2006-01-10 |
| 6967807 | Selecting physical cylinders in a disc drive employing discs with pre-written servo patterns | Chris Settje, Daniel Eugene Hobson, Teck Khoon Lim, Patrick TaiHeng Wong, Beng Wee Quak +2 more | 2005-11-22 |
| 6927932 | Filter for disk drive bi-phase servo demodulation | Kevin G. Christian | 2005-08-09 |
| 6917485 | Dynamic head switch timing recalibration apparatus and method | Chris Settje, Steven Koldewyn, Kar Wei Koay, Abhay T. Kataria, Marinko Bosnich +1 more | 2005-07-12 |
| 6586968 | Programmable bit ordering for serial port | Steven Schauer | 2003-07-01 |
| 6566922 | Zero phase and frequency restart PLL | Peter J. Windler | 2003-05-20 |
| 6434087 | Optical disc system and method for controlling bias coil and light source to process information on a storage medium | David E. Lewis | 2002-08-13 |
| 6418097 | Analog to digital converter assembly for normalizing servo error signals and multiplexing reference voltage inputs and digital outputs and improved optical drive system including same | Randolph Scott Crupper, Kurt W. Getreuer, Leonardus I. Grassens, David E. Lewis, Marvin B. Davis | 2002-07-09 |
| 6317391 | Optical disc system having current monitoring circuit with improved bias coil assembly and controller for laser driver and method for operating same | David E. Lewis | 2001-11-13 |
| 6278665 | Optical disc system including current monitoring circuit assembly having controller with improved optics module and laser driver and method for operating same | David E. Lewis | 2001-08-21 |
| 6266306 | Analog to digital converter and assembly for use in optical drive system to normalize servo error signals and multiplex reference voltage inputs and digital outputs | Randolph Scott Crupper, Kurt W. Getreuer, Leonardus J. Grassens, David E. Lewis, Marvin B. Davis | 2001-07-24 |
| 6243336 | Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal and focus capture method for use in same | Randolph Scott Crupper, Marvin B. Davis, Kurt W. Getreuer, Leonardus J. Grassens, David E. Lewis | 2001-06-05 |
| 6236625 | Optical disc system having current monitoring circuit with controller for laser driver and method for operating same | David E. Lewis | 2001-05-22 |
| 6233210 | Optical drive error tracking method and apparatus | — | 2001-05-15 |
| 6122232 | Isolation apparatus for use in disc drive system to mitigate effects of undesired mechanical forces and disc drive system including same | Randolph Scott Crupper, Marvin B. Davis, Kurt W. Getreuer, Leonardus J. Grassens, David E. Lewis | 2000-09-19 |
| 6091684 | Optical disc system and method for changing the rotational rate of an information storage medium | — | 2000-07-18 |
| 6087644 | Focus capture for optical disc system including detection of quad sum signal to close focus | — | 2000-07-11 |
| 6069857 | Optical disc system having improved circuitry for performing blank sector check on readable disc | David E. Lewis | 2000-05-30 |
| 6058081 | Optical drive system having servomotor operated relative to maximum quad sum signal | Randolph Scott Crupper, Kurt W. Getreuer, Leonardus J. Grassens, David E. Lewis, Marvin B. Davis | 2000-05-02 |
| 6034364 | Optical disc system including focus capture assembly with focus error signal circuit and method for operating same | — | 2000-03-07 |