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Inventor

Stephen W. Barr

Inventor
Midland, MI, US

Overview

5→
Patents
1988–2009
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 5 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G01Nprimary
G01NInvestigating or analysing materials by determining their chemical or physical properties29%
C11DDetergent compositions14%
E21BEarth or rock drilling14%
F04BPositive-displacement machines for liquids14%
F16DCouplings for transmitting rotation14%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests14%
PatentTitleYear
7,591,349'Liquid cooled brake assembly'20095,310,526'Chemical sensor'19945,133,644'Multi-pressure compensation of variable displacement pump'19924,906,395'Detergent package for laundering clothes'19904,760,732'Flow programmer for gas chromatography'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988–1994Patents assigned to DOW CHEMICAL CO (3)· patent assignee history
1988–1994Based in Midland, MI, US· patent location history
1992Patents assigned to HALLIBURTON CO (1)· patent assignee history
1992Based in Marlow, OK, US· patent location history
2009Patents assigned to WARNER ELECTRIC TECHNOLOGY LLC (1)· patent assignee history
2009Based in Monument, NM, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DOW CHEMICAL CO31988–1994
HALLIBURTON CO11992
WARNER ELECTRIC TECHNOLOGY LLC12009
Locations
LocationPatentsSpan
Midland, MI, US31988–1994
Monument, NM, US12009
Marlow, OK, US11992