Inventor

Theodore A. Schwarz

Inventor

Woodbury, MN, US

Overview

35→

Patents

1976–2013

Patent span

Physics

Primary field (CPC G)

Patents· 35 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 transducer88%

Y10TTechnical subjects covered by former us classification13%

PatentTitleYear

8,416,525'Magnetic media formatted with an intergrated thin film subgap subpole structure for arbitrary gap pattern magnetic recording head'2013 7,832,084'Methods for recording servo information'2010 7,710,675'Apparatuses and methods for pre-erasing during manufacture of magnetic tape'2010 7,576,949'Servo track magnetic recording head for pre-erasing magnetic tape'2009 7,511,907'Stepped time based servo pattern and head'2009 7,450,341'Intergrated thin film subgap subpole structure for arbitrary gap pattern magnetic recording heads and method of making the same'2008 7,393,066'Servo systems, servo heads, servo patterns for data storage especially for reading, writing, and recording in magnetic recording tape'2008 7,391,587'Servo systems, servo heads, servo patterns for data storage especially for reading, writing, and recording in magnetic recording tape'2008 7,301,716'Stepped time based servo pattern and head'2007 7,283,317'Apparatuses and methods for pre-erasing during manufacture of magnetic tape'2007 7,106,544'Servo systems, servo heads, servo patterns for data storage especially for reading, writing, and recording in magnetic recording tape'2006 6,947,247'Large angle azimuth recording and head configurations'2005 6,330,123'Head assembly having a single pass servo writer'2001 6,134,070'Encoded servo track configurations, servo writer and systems/method regarding same'2000 6,122,147'Negative pressure head contour in a linear tape recording system with tape deforming cavity'2000 6,091,565'Head assembly having a single pass servo writer'2000 5,946,156'Tape servo system and methods, write/read heads, and servo track configurations regarding same'1999 5,786,967'Tape cartridge including an indication device to distinguish between cartridges having different characteristics but nearly identical physical characteristics'1998 5,609,948'Laminate containing diamond-like carbon and thin-film magnetic head assembly formed thereon'1997 5,572,378'Direct file access system for magnetic tape'1996 5,541,793'Bidirectional thin-film magnetoresistive tape head assembly'1996 5,434,732'Balanced cantilevered head positioning mechanism for multitrack tape recorder'1995 5,390,054'Method and system for minimizing the error rate of a digital recording system by predicting the optimal bias current'1995 5,379,170'Dynamically adjustable head positioning mechanism for tape drives'1995 5,339,202'Method and apparatus for amplitude compensated write equalization'1994 5,331,493'Bidirectional thin-film magnetoresistive tape head assembly'1994 5,312,644'Method of making a magnetoresistive head with integrated bias and magnetic shield layer'1994 5,311,385'Magnetoresistive head with integrated bias and magnetic shield layer'1994 5,280,402'Combined stepper motor and voice coil head positioning apparatus'1994 5,229,895'Multi-track servo recording head assembly'1993 4,863,114'Magnetic tape cartridge identification'1989 4,647,993'Rotary head recording system'1987 4,636,886'Rotary head recording system'1987 4,255,772'Read/write magnetic head assembly with magnetoresistive sensor'1981 3,979,775'Magnetoresistive multitransducer assembly with compensation elements for thermal drift and bias balancing'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1981Patents assigned to IBM (2)· patent assignee history

1976–1981Based in Saratoga, CA, US· patent location history

1987Patents assigned to MAGNETIC PERIPHERALS INC (2)· patent assignee history

1987Based in Bloomington, MN, US· patent location history

1989–1997Patents assigned to MINNESOTA MINING & MFG (12)· patent assignee history

1989–2010Based in St. Paul, MN, US· patent location history

1993–2013Based in Woodbury, MN, US· patent location history

1996–2001Patents assigned to IMATION CORP (7)· patent assignee history

2005–2013Patents assigned to ADVANCED RES CORP (12)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
ADVANCED RES CORP	12	2005–2013
MINNESOTA MINING & MFG	12	1989–1997
IMATION CORP	7	1996–2001
IBM	2	1976–1981
MAGNETIC PERIPHERALS INC	2	1987

Locations

Location	Patents	Span
Woodbury, Minnesota, US	25	1993–2013
St. Paul, Minnesota, US	6	1989–2010
Bloomington, Minnesota, US	2	1987
Saratoga, California, US	2	1976–1981