Inventor · Minneapolis, MN, US

Drew Michael Mader

23Patents
5h-index
17Co-inventors
58Inventor score

Filing activity: Jan 13, 2015 → Apr 29, 2022

Most-cited inventions

PatentTitleAreaCited byStatus
US9916849B1 Method and apparatus for detecting and remediating in response to insufficient or excessive HAMR optical power Physics 32 Active
US9236081B1 Laser temperature calibration in a HAMR device Physics 31 Active
US9311951B1 Laser adjustment during field operation of a heat-assisted magnetic recording data storage device Physics 10 Active
US10339963B1 Determining thermal gradient of a HAMR hotspot using pseudo-random bit sequences recorded at a stepped laser power Physics 5 Active
US9202506B1 Current boost profile applied to laser during heat-assisted magnetic recording Physics 5 Active
US10515658B1 Laser calibration using temperature compensation equation for heat-assisted magnetic recording device Physics 5 Active
US9589587B1 Laser adjustment during field operation of a heat-assisted magnetic recording data storage device Physics 4 Active
US10643651B1 Determining instability zones of a laser of a heat-assisted magnetic recording head Physics 4 Active
US9837118B1 Determining thermal gradient of heat-assisted magnetic recording hotspot based on timing errors Physics 4 Active
US9842621B1 Heat-assisted magnetic recording apparatus capable of detecting optical power change based on one or more of phase errors and dibit response Physics 4 Active
US10770106B1 System and method using on-ramp heating to detect laser mode hopping in heat assisted recording Physics 3 Active
US10127930B1 In-field laser calibration for heat-assisted magnetic recording head using temperature compensation equation Physics 3 Active
US9548068B1 Determining optical degradation in a heat-assisted read/write head Physics 2 Active
US9349415B1 Qualifying a recording head based on symmetry of a cross-track profile Physics 2 Active
US10665254B1 Readback waveform oversampling method and apparatus Physics 2 Active
US10395673B1 In-field laser calibration for heat-assisted magnetic recording head using temperature compensation equation Physics 1 Active
US9830942B1 Obtaining a predetermined phase shift in data using different write precompensation associated with different NRZI patterns Physics 1 Active
US11881239B1 Determining fly height using readback signal distortion Physics 0 Active
US10832704B2 Laser calibration using temperature compensation equation for heat-assisted magnetic recording device Physics 0 Active
US11011189B2 Readback waveform oversampling method and apparatus Physics 0 Active
US10083716B1 Laser calibration for heat-assisted magnetic recording head using interleaved laser current Physics 0 Active
US9990950B1 Calibration and adjusting target pre-write clearance offset for a heat-assisted magnetic recording device Physics 0 Active
US11908502B2 Partial pulse pairing for improved read signal quality Electricity 0 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.