Inventor

Charles H. Tolman

Inventor

Bloomington, MN, US

Overview

1988–2004

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 transducer57%

Y10TTechnical subjects covered by former us classification13%

G01RMeasuring electric variables9%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%

C23CCoating metallic material4%

C25DProcesses for the electrolytic or electrophoretic production of coatings4%

H10NElectric solid-state devices not otherwise provided for4%

PatentTitleYear

6,788,496'Narrow top pole of a write element'2004 6,706,156'Method of making an improved MR sensor'2004 6,342,311'High magnetic moment seed layer materials for writer pole tips'2002 6,222,702'Magnetic read element shield having dimensions that minimize domain wall movement'2001 5,828,528'MR sensors with selected resistances for the sensing and biasing layers to enhance reading capabilities'1998 5,598,309'Method of making inductive transducer with closed-loop pole circumscribing I-shaped pole'1997 5,563,753'Contact scheme for minimizing inductive pickup in magnetoresistive read heads'1996 5,554,265'Method of making a magnetoresistive sensor'1996 5,546,256'Inductive transducer with closed-loop pole circumscribing I-shaped pole to reduce leakage flux'1996 RE035228'Inductive thin film head having improved readback characteristics'1996 5,495,378'Magnetoresistive sensor with improved performance and processability'1996 5,260,652'Magnetoresistive sensor with electrical contacts having variable resistive regions for enhanced sensor sensitivity'1993 5,170,303'Inductive thin film head having improved readback characteristics'1992 4,821,133'Bottleneck magnetoresistive element'1989 4,756,816'Electrodeposition of high moment cobalt iron'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988–1989Patents assigned to MAGNETIC PERIPHERALS INC (2)· patent assignee history

1988–2004Based in Bloomington, MN, US· patent location history

1992–2002Patents assigned to SEAGATE TECHNOLOGY (11)· patent assignee history

2004Patents assigned to SEAGATE TECHNOLOGY LLC (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SEAGATE TECHNOLOGY	11	1992–2002
MAGNETIC PERIPHERALS INC	2	1988–1989
SEAGATE TECHNOLOGY LLC	2	2004

Locations

Location	Patents	Span
Bloomington, Minnesota, US	15	1988–2004