Inventor

Gregory Michael Frees

Inventor

Los Altos, CA, US

Overview

1997–2008

Patent span

Physics

Primary field (CPC G)

Patents· 15 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 transducer75%

H02KDynamo-electric machines15%

F16CShafts5%

F16FSprings5%

PatentTitleYear

7,411,760'System and method for correcting for head tilt in HDD'2008 7,251,100'Mounting interface for a spindle motor'2007 7,133,235'System and method for correcting for head tilt in HDD'2006 7,009,795'System and method for correcting for head tilt in HDD'2006 6,577,463'Tangential misalignment precompensation in a direct access storage device'2003 6,567,231'Vibration mode compensation for disk drive'2003 6,522,493'Position error signal linearization using an auxiliary discontinuity removal routine'2003 6,429,995'Position error signal calibration using measured bursts'2002 6,327,115'Disk drive apparatus, attachment structure, and attachment method'2001 6,188,191'Servo system responsive to temperature changes'2001 6,178,059'Method for writing servo information on a magnetic recording disk'2001 6,122,125'Head selectable servo notch filter and method for improving servo system performance'2000 5,905,608'Dynamically tuned outer arms for improved rotary actuator performance'1999 5,625,511'Stepped spindle motor shaft to reduce disk drive acoustic noise'1997 5,598,306'Damping post for reducing acoustic noise in a disk drive'1997

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1997–2003Patents assigned to IBM (11)· patent assignee history

1997Based in Sunnyvale, CA, US· patent location history

1999–2008Based in Los Altos, CA, US· patent location history

2000Based in Los Alto, CA, US· patent location history

2006–2008Patents assigned to HITACHI GLOBAL STORAGE TECH (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
IBM	11	1997–2003
HITACHI GLOBAL STORAGE TECH	4	2006–2008

Locations

Location	Patents	Span
Los Altos, California, US	12	1999–2008
Sunnyvale, California, US	2	1997
Los Alto, California, US	1	2000