Inventor

Albert John Wallash

Inventor

Morgan Hill, CA, US

Overview

1995–2019

Patent span

Physics

Primary field (CPC G)

Patents· 54 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 transducer54%

Y10TTechnical subjects covered by former us classification18%

G01RMeasuring electric variables5%

H01PWaveguides5%

H05KPrinted circuits5%

B24BMachines, devices, or processes for grinding or polishing2%

B82YSpecific uses or applications of nanostructures2%

H03HImpedance networks, e.g. resonant circuits2%

F16CShafts1%

G06FElectric digital data processing1%

PatentTitleYear

10,411,670Compact broadband common-mode filter2019 10,283,150Suspension adjacent-conductors differential-signal-coupling attenuation structures2019 10,285,259Solenoid filter built into a printed circuit board2019 10,244,618Patterned ground structure filter designs with improved performance2019 9,786,331'Shielded three-layer patterned ground structure'2017 9,717,140'Shielded patterned ground structure filter for EMI reduction'2017 9,275,664'Shielded flex cable for use in a disk drive'2016 9,196,266'Integrated lead suspension (ILS) for two-dimensional magnetic recording (TDMR) disk drive'2015 9,117,474'Implementing write head device for contact detection and spacing sensing'2015 9,117,469'Suspension design with split substrate for improved interference signal immunity'2015 9,036,306'Grounding for a hard disk drive suspension tail'2015 8,873,231'Electronic device enclosure configured to shield against electromagnetic interference'2014 8,570,684'Implementing integrated spin-torque oscillator and interface bias control for hard disk drives'2013 8,508,887'Reducing recession by heating a magnetic tape head'2013 8,274,756'Use of carbon nanotubes to form conductive gaskets deployed in sensitive environments'2012 8,264,233'Magnetoresistive electrostatic discharge (ESD) detector'2012 8,248,725'System and method to electrically ground fluid dynamic bearings'2012 8,004,795'Magnetic head design having reduced susceptibility to electrostatic discharge from media surfaces'2011 7,957,083'Method for early detection of magnetic head degradation due to carbon overcoat wear'2011 7,595,949'Method for active cancellation of write-to-read crosstalk'2009 7,505,229'Disk drive flex cable with ESD contact pad'2009 7,474,510'Disk drive head reset for parked head using closely spaced magnet'2009 7,187,512'Method and system for actively controlling and reducing induced electrostatic voltage on a magnetic storage disk'2007 6,905,350'Two-step electrical connector and method using high resistance path for electrostatic discharge'2005 6,498,696'Unipolar last write which improves magnetic stability'2002 6,359,750'Data storage system with TiC MR-head magnetic shield dummy shield spark gap'2002 6,320,715'Drive electronics employing unipolar last write for improved magnetic stability'2001 6,288,880'Method of making TiC MR-head magnetic shield dummy shield spark gap'2001 6,169,639'Unipolar last write for improved magnetic stability'2001 6,081,409'TiC MR-head magnetic shield dummy shield spark gap'2000 6,054,330'Method for protecting a magnetoresistive sensor element'2000 5,867,888'Magnetic head/silicon chip integration method'1999 5,783,981'Magnetic reinitialization of thin film magnetoresistive reproducing heads at the suspension level of media drive manufacturing'1998 5,777,829'Method and apparatus for providing electrostatic discharge protection for an inductive coil of a magnetic transducer'1998 5,771,571'Method for manufacturing thin film slider with on-board multi-layer integrated circuit'1998 5,768,068'Head/suspension design having fewer signal wires and making the same'1998 5,761,009'Having parastic shield for electrostatic discharge protection'1998 5,757,590'Fusible-link removable shorting of magnetoresistive heads for electrostatic discharge protection'1998 5,735,036'Lapping process for minimizing shorts and element recession at magnetic head air bearing surface'1998 5,712,747'Thin film slider with on-board multi-layer integrated circuit'1998 5,710,682'Electrostatic discharge protection system for MR heads'1998 5,664,319'Magnetic reinitialization of thin film magnetoresistive reproducing heads at the suspension level of media drive manufacturing'1997 5,661,614'Method and apparatus for error recovery for unstable magnetorestrictive heads'1997 5,644,454'Electrostatic discharge protection system for MR heads'1997 5,638,237'Fusible-link removable shorting of magnetoresistive heads for electrostatic discharge protection'1997 5,617,289'Magnetic reinitialization of thin film magnetoresistive reproducing heads at the suspension level of media drive manufacturing'1997 5,603,156'Lapping process for minimizing shorts and element recession at magnetic head air bearing surface'1997 5,587,857'Silicon chip with an integrated magnetoresistive head mounted on a slider'1996 5,559,051'Process for manufacturing a silicon chip with an integrated magnetoresistive head mounted on a slider'1996 5,523,898'Partial MR sensor bias current during write'1996 5,508,866'Magnetoresistive sensor having exchange-coupled stabilization for transverse bias layer'1996 5,492,720'Method of manufacturing a magnetoresistive sensor'1996 5,491,605'Shorted magnetoresistive head elements for electrical overstress and electrostatic discharge protection'1996 5,465,186'Shorted magnetoresistive head leads for electrical overstress and electrostatic discharge protection during manufacture of a magnetic storage system'1995

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1995–2002Patents assigned to IBM (29)· patent assignee history

1995–2019Based in Morgan Hill, CA, US· patent location history

2005–2009Patents assigned to MAXTOR CORP (4)· patent assignee history

2011–2012Patents assigned to HITACHI GLOBAL STORAGE TECH NL (4)· patent assignee history

2012–2016Patents assigned to HGST Netherlands BV (9)· patent assignee history

2017–2019Patents assigned to WESTERN DIGITAL TECH INC (6)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
IBM	29	1995–2002
HGST Netherlands BV	9	2012–2016
WESTERN DIGITAL TECH INC	6	2017–2019
HITACHI GLOBAL STORAGE TECH NL	4	2011–2012
MAXTOR CORP	4	2005–2009

Locations

Location	Patents	Span
Morgan Hill, California, US	54	1995–2019