Inventor

Drew Michael Mader

Inventor

Minneapolis, MN, US

Overview

2015–2021

Patent span

Physics

Primary field (CPC G)

Patents· 21 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 transducer95%

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light5%

PatentTitleYear

11,011,189Readback waveform oversampling method and apparatus2021 10,832,704Laser calibration using temperature compensation equation for heat-assisted magnetic recording device2020 10,770,106System and method using on-ramp heating to detect laser mode hopping in heat assisted recording2020 10,665,254Readback waveform oversampling method and apparatus2020 10,643,651Determining instability zones of a laser of a heat-assisted magnetic recording head2020 10,515,658Laser calibration using temperature compensation equation for heat-assisted magnetic recording device2019 10,395,673In-field laser calibration for heat-assisted magnetic recording head using temperature compensation equation2019 10,339,963Determining thermal gradient of a HAMR hotspot using pseudo-random bit sequences recorded at a stepped laser power2019 10,127,930In-field laser calibration for heat-assisted magnetic recording head using temperature compensation equation2018 10,083,716Laser calibration for heat-assisted magnetic recording head using interleaved laser current2018 9,990,950Calibration and adjusting target pre-write clearance offset for a heat-assisted magnetic recording device2018 9,916,849'Method and apparatus for detecting and remediating in response to insufficient or excessive HAMR optical power'2018 9,842,621'Heat-assisted magnetic recording apparatus capable of detecting optical power change based on one or more of phase errors and dibit response'2017 9,837,118Determining thermal gradient of heat-assisted magnetic recording hotspot based on timing errors2017 9,830,942Obtaining a predetermined phase shift in data using different write precompensation associated with different NRZI patterns2017 9,589,587'Laser adjustment during field operation of a heat-assisted magnetic recording data storage device'2017 9,548,068'Determining optical degradation in a heat-assisted read/write head'2017 9,349,415'Qualifying a recording head based on symmetry of a cross-track profile'2016 9,311,951'Laser adjustment during field operation of a heat-assisted magnetic recording data storage device'2016 9,236,081'Laser temperature calibration in a HAMR device'2016 9,202,506'Current boost profile applied to laser during heat-assisted magnetic recording'2015

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2015–2021Patents assigned to SEAGATE TECHNOLOGY LLC (21)· patent assignee history

2015–2020Based in Bloomington, MN, US· patent location history

2017–2021Based in Minneapolis, MN, US· patent location history

2019Patents assigned to SEAGATE TECH LL (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SEAGATE TECHNOLOGY LLC	21	2015–2021
SEAGATE TECH LL	1	2019

Locations

Location	Patents	Span
Minneapolis, Minnesota, US	11	2017–2021
Bloomington, Minnesota, US	10	2015–2020