Inventor · disambiguated record
Robert P. Ryan
Also filed as: RYAN ROBERT · RYAN ROBERT P · RYAN ROBERT PATRICK
91 granted patents·4 pending applications·4,929 citations·filing 1981–2024
99Inventor score
Files withWESTERN DIGITAL TECH INC59AES GLOBAL HOLDINGS PTE LTD4PRINTRONIX INC3RYAN ROBERT P3WESTERN DIGITAL CORP3
Top patents by PatentIndex Score
95 records- 0199US7907364B2Disk drive including a delay circuit to provide a delayed reset signalWESTERN DIGITAL TECH INC·Filed 2008·Granted Mar 15, 2011·132 cites·25 claims
- 0299US7203021B1Self-heating disk driveWESTERN DIGITAL TECH INC·Filed 2005·Granted Apr 10, 2007·186 cites·42 claims
- 0399US6795268B1Disk drive employing seek time vcm ir voltage calibration for velocity control of an actuator armWESTERN DIGITAL TECH INC·Filed 2000·Granted Sep 21, 2004·170 cites·18 claims
- 0499US6577465B1Disk drive comprising spin down circuitry having a programmable signal generator for enhancing power and braking controlWESTERN DIGITAL TECH INC·Filed 2000·Granted Jun 10, 2003·136 cites·14 claims
- 0599US6549361B1Disk drive comprising spin down circuitry having a power clamp circuit for enhancing power and braking controlWESTERN DIGITAL TECH INC·Filed 2000·Granted Apr 15, 2003·130 cites·10 claims
- 0699US6549359B1Disk drive comprising spin down circuitry having a current limit circuit for enhancing power and braking controlWESTERN DIGITAL TECH INC·Filed 2000·Granted Apr 15, 2003·135 cites·10 claims
- 0798US8630054B2Systems and methods for data throttling during disk drive power downBENNETT GEORGE J·Filed 2011·Granted Jan 14, 2014·114 cites·22 claims
- 0898US8370683B1System and method to reduce write splice failuresWESTERN DIGITAL TECH INC·Filed 2009·Granted Feb 5, 2013·135 cites·30 claims
- 0998US7852588B1Disk drive adjusting gain of shock detector relative to resonant frequency amplitudeWESTERN DIGITAL TECH INC·Filed 2008·Granted Dec 14, 2010·115 cites·22 claims
- 1098US7548392B1Disk drive controlling a voice coil motor during an emergency unloadWESTERN DIGITAL TECH INC·Filed 2007·Granted Jun 16, 2009·123 cites·21 claims
- 1198US7158329B1Disk drive employing active braking using inductive senseWESTERN DIGITAL TECH INC·Filed 2005·Granted Jan 2, 2007·119 cites·12 claims
- 1298US6970319B1Disk drive comprising a pulse width modulated demand limit circuit for enhancing power management during spin-downWESTERN DIGITAL TECH INC·Filed 2003·Granted Nov 29, 2005·132 cites·18 claims
- 1398US6967458B1Decreasing spin up time in a disk drive by adjusting a duty cycle of a spindle motor PWM signal to maintain constant average input currentWESTERN DIGITAL TECH INC·Filed 2002·Granted Nov 22, 2005·123 cites·18 claims
- 1498US6934135B1Disk drive monitoring a supply current to protect motor driver circuitsWESTERN DIGITAL TECH INC·Filed 2003·Granted Aug 23, 2005·123 cites·12 claims
- 1598US6867944B1Disk drive comprising VCM stall detector for velocity control of an actuator armWESTERN DIGITAL TECH INC·Filed 2000·Granted Mar 15, 2005·122 cites·6 claims
- 1698US6690536B1Disk drive employing VCM demand current to calibrate VCM IR voltage for velocity control of an actuator armWESTERN DIGITAL TECH INC·Filed 2000·Granted Feb 10, 2004·145 cites·12 claims
- 1798US6574062B1Disk drive comprising a demand limit circuit for enhancing power management during spin downWESTERN DIGITAL TECH INC·Filed 2000·Granted Jun 3, 2003·134 cites·12 claims
- 1898US6560056B1Disk drive comprising a motor driver IC employing a serial interface for initiating the transmission of real-time status data to a controller ICWESTERN DIGITAL TECH INC·Filed 2001·Granted May 6, 2003·116 cites·20 claims
- 1998US6538839B1Disk drive employing adaptive feed-forward vibration compensation to enhance a retry operationWESTERN DIGITAL TECH INC·Filed 2001·Granted Mar 25, 2003·142 cites·8 claims
- 2098US6476996B1Disk drive comprising an actuator driver circuit for retracting a head independent of a servo microprocessor when a spindle speed fault mode is detectedWESTERN DIGITAL TECH INC·Filed 2000·Granted Nov 5, 2002·152 cites·11 claims
- 2197US8767354B1Data storage device employing cascaded voltage regulators during power failureFERRIS TIMOTHY A·Filed 2011·Granted Jul 1, 2014·89 cites·20 claims
- 2297US8717696B1Disk drive adjusting noise spectrum to reduce resonance excitation of shock detectorWESTERN DIGITAL TECH INC·Filed 2012·Granted May 6, 2014·97 cites·22 claims
- 2397US8179626B1Adaptive shock detectionRYAN ROBERT P·Filed 2009·Granted May 15, 2012·119 cites·24 claims
- 2497US7573670B1Disk drive seeking to OD track and then ramping velocity to implement fast unloadWESTERN DIGITAL TECH INC·Filed 2007·Granted Aug 11, 2009·114 cites·11 claims
- 2597US7113365B1Disk drive comprising a spindle motor having a windings shield for reduced disk voltage couplingWESTERN DIGITAL TECH INC·Filed 2002·Granted Sep 26, 2006·124 cites·18 claims
- 2697US7095579B1Disk drive employing momentum based unload during power failureWESTERN DIGITAL TECH INC·Filed 2005·Granted Aug 22, 2006·118 cites·12 claims
- 2797US6900959B1Disk drive comprising an offset-nulling amplifier for detecting a back EMF voltage of a voice coil motorWESTERN DIGITAL TECH INC·Filed 2003·Granted May 31, 2005·119 cites·9 claims
- 2897US6104153ADisk drive employing method of spinning down its spindle motor to reduce the time required for spinning it down and subsequently spinning it upWESTERN DIGITAL CORP·Filed 1999·Granted Aug 15, 2000·151 cites·8 claims
- 2996US6788483B1Disk drive comprising a programmable inverting voltage regulator configured relative to the disk drive's mode of operationWESTERN DIGITAL TECH INC·Filed 2001·Granted Sep 7, 2004·117 cites·25 claims
- 3095US8947816B1Data storage assembly for archive cold storageWESTERN DIGITAL TECH INC·Filed 2013·Granted Feb 3, 2015·24 cites·29 claims
- 3195US8054022B1Reduced acoustic noise during spin-up by driving a spindle motor open loop using sinusoidal signalsWESTERN DIGITAL TECH INC·Filed 2008·Granted Nov 8, 2011·108 cites·22 claims
- 3295US7224546B1Disk drive employing a calibrated brake pulse to reduce acoustic noise when latching an actuator armWESTERN DIGITAL TECH INC·Filed 2004·Granted May 29, 2007·111 cites·18 claims
- 3395US6825622B1Production line spindle control circuit employing a sinusoidal driver with back EMF controlWESTERN DIGITAL TECH INC·Filed 2002·Granted Nov 30, 2004·65 cites·14 claims
- 3495US6281652B1Method of using two low-resolution DACS for converting high-resolution digital demands into analog output signals that monotonically drive an actuator motor in a disk driveWESTERN DIGITAL CORP·Filed 2000·Granted Aug 28, 2001·128 cites·34 claims
- 3595US6198590B1Disk drive employing method of spinning down its spindle motor to reduce the time required for subsequently spinning it upWESTERN DIGITAL CORP·Filed 1998·Granted Mar 6, 2001·142 cites·6 claims
- 3694US11757854B2Secure stream buffer on network attached storageWESTERN DIGITAL TECH INC·Filed 2021·Granted Sep 12, 2023·2 cites·20 claims
- 3794US11264985B1Bipolar pulsed-voltage gate driverAES GLOBAL HOLDINGS PTE LTD·Filed 2021·Granted Mar 1, 2022·3 cites·17 claims
- 3894US8610391B1Disk drive optimizing spindle motor torque by adjusting leading phase angle during spin-upYANG WENLI·Filed 2011·Granted Dec 17, 2013·117 cites·6 claims
- 3993US11049517B1Data storage device staggering access operations to facilitate concurrent access of two disk surfacesWESTERN DIGITAL TECH INC·Filed 2020·Granted Jun 29, 2021·6 cites·14 claims
- 4090US10742736B2Integrated erasure coding for data storage and transmissionWESTERN DIGITAL TECHNOLOGIES INC·Filed 2017·Granted Aug 11, 2020·8 cites·19 claims
- 4190US10447667B2Secure stream buffer on network attached storageWESTERN DIGITAL TECH INC·Filed 2018·Granted Oct 15, 2019·5 cites·20 claims
- 4290US10284291B1Node configuration in optical networkWESTERN DIGITAL TECH INC·Filed 2018·Granted May 7, 2019·5 cites·36 claims
- 4390US9948618B2Secure stream buffer on network attached storageWESTERN DIGITAL TECH INC·Filed 2015·Granted Apr 17, 2018·6 cites·17 claims
- 4490US9141177B1Data storage device employing glitch compensation for power loss detectionWESTERN DIGITAL TECH INC·Filed 2014·Granted Sep 22, 2015·12 cites·20 claims
- 4589US11196725B2Secure stream buffer on network attached storageWESTERN DIGITAL TECH INC·Filed 2019·Granted Dec 7, 2021·4 cites·20 claims
- 4689US10150249B2Dual head extruder for three-dimensional additive printerWESTERN DIGITAL TECH INC·Filed 2015·Granted Dec 11, 2018·3 cites·3 claims
- 4789US10150239B2Extruder for three-dimensional additive printerWESTERN DIGITAL TECH INC·Filed 2015·Granted Dec 11, 2018·3 cites·26 claims
- 4889US9877415B2Cold storage server with heat dissipationWESTERN DIGITAL TECH INC·Filed 2016·Granted Jan 23, 2018·6 cites·20 claims
- 4989US9390749B2Power failure management in disk drivesWESTERN DIGITAL TECH INC·Filed 2015·Granted Jul 12, 2016·3 cites·18 claims
- 5088US11451129B1Gate driver circuit for a power supply voltage converterAES GLOBAL HOLDINGS PTE LTD·Filed 2021·Granted Sep 20, 2022·2 cites·20 claims
Showing the top 50 of 95 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →