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Randall David Hampshire
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Agra, OK, US
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Patents Grants
last 30 patents
Information
Patent Grant
Suppression of seek repeatable runout
Patent number
8,730,614
Issue date
May 20, 2014
Seagate Technology LLC
Josiah N. Wernow
G11 - INFORMATION STORAGE
Information
Patent Grant
Servo processors that alternately control head positioning relative...
Patent number
8,040,631
Issue date
Oct 18, 2011
Seagate Technology LLC
Randall David Hampshire
G11 - INFORMATION STORAGE
Information
Patent Grant
Microactuator servo system in a disc drive
Patent number
6,768,610
Issue date
Jul 27, 2004
Seagate Technology LLC
John C. Morris
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Information
Patent Grant
Servo control using continuous position error signal with high orde...
Patent number
6,574,068
Issue date
Jun 3, 2003
Seagate Technology LLC
Randall D. Hampshire
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Information
Patent Grant
Servo processor code evaluation using a virtual disc drive
Patent number
6,389,384
Issue date
May 14, 2002
Seagate Technology LLC
Randall D. Hampshire
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Information
Patent Grant
Multi-task operating system for a disc drive
Patent number
6,198,591
Issue date
Mar 6, 2001
Seagate Technology LLC
Randall D. Hampshire
G11 - INFORMATION STORAGE
Information
Patent Grant
Method for adapting seeks of a disc drive transducer to the maximum...
Patent number
6,115,205
Issue date
Sep 5, 2000
Seagate Technology, Inc.
David C. Waugh
G11 - INFORMATION STORAGE
Information
Patent Grant
Modeling position error nonlinearity to improve servo performance
Patent number
6,091,567
Issue date
Jul 18, 2000
Seagate Technology, Inc.
Evert Steen Cooper
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Information
Patent Grant
Weighted linearization of a position error signal in a disc drive
Patent number
6,046,879
Issue date
Apr 4, 2000
Seagate Technology, Inc.
Randall David Hampshire
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Information
Patent Grant
Object positioning using discrete sliding mode control with variabl...
Patent number
6,046,878
Issue date
Apr 4, 2000
Seagate Technology, Inc.
Zhiqiang Liu
G11 - INFORMATION STORAGE
Information
Patent Grant
Compensating for variations in torque capability of voice coil motors
Patent number
5,835,302
Issue date
Nov 10, 1998
Seagate Technology, Inc.
Otis L. Funches
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Information
Patent Grant
Dynamic compensation of servo burst measurement offsets in a disc d...
Patent number
5,835,300
Issue date
Nov 10, 1998
Seagate Technology, Inc.
Robert Dale Murphy
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Information
Patent Grant
Data track following method for disc drives
Patent number
5,777,816
Issue date
Jul 7, 1998
Seagate Technology, Inc.
Randall D. Hampshire
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Information
Patent Grant
Dynamic compensation of servo burst measurement offsets in a disc d...
Patent number
5,774,297
Issue date
Jun 30, 1998
Seagate Technology, Inc.
Randall D. Hampshire
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Information
Patent Grant
Detection of mechanical defects in a disc drive using injected test...
Patent number
5,654,841
Issue date
Aug 5, 1997
Seagate Technology, Inc.
Daniel E. Hobson
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Information
Patent Grant
Method for reducing noise during seeks in a hard disk drive
Patent number
5,475,545
Issue date
Dec 12, 1995
Seagate Technology, Inc.
Randall D. Hampshire
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Information
Patent Grant
Correction of current feedback offset for disc drive servo systems
Patent number
5,329,409
Issue date
Jul 12, 1994
Seagate Technology, Inc.
Randall D. Hampshire
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Information
Patent Grant
Multi-task operating system for a disc drive
Patent number
5,305,447
Issue date
Apr 19, 1994
Seagate Technology, Inc.
Randall D. Hampshire
G11 - INFORMATION STORAGE
Information
Patent Grant
Compensating for variations in torque capability of voice coil motors
Patent number
5,305,160
Issue date
Apr 19, 1994
Seagate Technology, Inc.
Otis L. Funches
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
SUPPRESSION OF SEEK REPEATABLE RUNOUT
Publication number
20140063651
Publication date
Mar 6, 2014
SEAGATE TECHNOLOGY LLC
Josiah N. Wernow
G11 - INFORMATION STORAGE
Information
Patent Application
SERVO PROCESSORS THAT ALTERNATELY CONTROL HEAD POSITIONING RELATIVE...
Publication number
20100290153
Publication date
Nov 18, 2010
Randall David Hampshire
G11 - INFORMATION STORAGE