Inventor
Bryan Scott Rowan
Inventor
San Jose, CA, US
Overview
Patents· 18 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer53%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters13%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems7%
A61FFilters implantable into blood vessels3%
A61HPhysical therapy apparatus, e.g. devices for locating or stimulating reflex points in the body3%
A61NElectrotherapy3%
G05BControl or regulating systems in general3%
G05FSystems for regulating electric or magnetic variables3%
H03FAmplifiers3%
H03MCoding3%
PatentTitleYear
9,934,803Data storage device attenuating multiple actuator coupling disturbance20189,792,938'Data storage device communicating servo information between servo channels of multiple actuators'20177,957,847'Voltage regulating systems responsive to feed-forward information from deterministic loads'20117,888,902'Adjustable voice coil motor driver'20117,595,953'Magnetic recording disk drive with switchable compensation for mechanical and electrical disturbances'20097,486,463'Power disturbance compensation'20097,332,832'Removable hard disk drive (HDD) that is hot-plug compatible with multiple external power supply voltages'20087,309,967'Motor drive circuitry with regenerative braking for disk drive'20076,560,057'Head positioning system for a disk drive during a power down condition'20036,388,832'Method and system for providing spindle motor control for head loading in a disk drive'20026,362,766'Variable pulse PWM DAC method and apparatus'20026,262,619'Method and system for power amplifier offset nulling'20016,181,091'Apparatus and method for control of a multi-pole brushless DC motor in the event of saturation detection'20016,067,202'Method and apparatus for controlling spindle motor commutation switching times in a disk drive'20005,986,426'Adaptive pulse width modulated motor control'19995,963,393'Servo-free velocity estimator for coil driven actuator arm in a data storage drive'19995,886,489'Apparatus and method for reducing spindle power and acoustic noise in a disk drive'19995,781,363'Servo-free velocity estimator for coil driven actuator arm in a data storage drive'1998Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1998–2003Patents assigned to IBM (10)· patent assignee history
1998–2018Based in San Jose, CA, US· patent location history
2001–2003Based in Los Gatos, CA, US· patent location history
2007–2009Patents assigned to HITACHI GLOBAL STORAGE TECH (4)· patent assignee history
2011Patents assigned to HITACHI GLOBAL STORAGE TECH NL (2)· patent assignee history
2017–2018Patents assigned to WESTERN DIGITAL TECH INC (2)· patent assignee history
2017Patents assigned to WESTERN DIGIAL TECH INC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| IBM | 10 | 1998–2003 |
| HITACHI GLOBAL STORAGE TECH | 4 | 2007–2009 |
| HITACHI GLOBAL STORAGE TECH NL | 2 | 2011 |
| WESTERN DIGITAL TECH INC | 2 | 2017–2018 |
| WESTERN DIGIAL TECH INC | 1 | 2017 |
Locations
| Location | Patents | Span |
|---|---|---|
| San Jose, California, US | 13 | 1998–2018 |
| Los Gatos, California, US | 5 | 2001–2003 |