Inventor

John Schadegg

Inventor

Niwot, CO, US

Overview

1988–2003

Patent span

Physics

Primary field (CPC G)

Patents· 13 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 transducer71%

G06FElectric digital data processing12%

H03MCoding12%

H04LTransmission of digital information, e.g. telegraphic communication6%

PatentTitleYear

6,560,055'ID-less format defect management for automatic track processing including translation of physical sector number into logical sector number'2003 6,332,182'Disk drive control without identification fields'2001 6,125,469'Error correction method and apparatus'2000 6,025,966'Defect management for automatic track processing without ID field'2000 5,901,010'Magnetic disc recording system employing two stage actuators for simultaneous accesses through multiple recording heads'1999 5,848,438'Memory mapping defect management technique for automatic track processing without ID field'1998 5,844,911'Disc storage system with spare sectors dispersed at a regular interval around a data track to reduced access latency'1998 5,844,919'Sector and track level error correction system for disc storage systems'1998 5,740,358'Defect management and split field processing in disk storage systems'1998 5,701,304'Method for correcting unrecoverable sectors using track level redundancy in a disc drive storage system'1997 5,602,857'Error correction method and apparatus'1997 5,455,721'Method and apparatus for automatic sector pulse generation and split field calculation in disk drives'1995 4,736,341'Intelligent hard disk drive subsystem'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988Patents assigned to XEBEC DEV PARTNERS LTD (1)· patent assignee history

1988Based in Foster City, CA, US· patent location history

1995–2003Patents assigned to CIRRUS LOGIC INC (12)· patent assignee history

1995–2003Based in Niwot, CO, US· patent location history

1998–2001Based in Longmont, CO, US· patent location history

1998Based in Littleton, CO, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CIRRUS LOGIC INC	12	1995–2003
XEBEC DEV PARTNERS LTD	1	1988

Locations

Location	Patents	Span
Niwot, CO, US	9	1995–2003
Longmont, CO, US	2	1998–2001
Littleton, CO, US	1	1998
Foster City, California, US	1	1988