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Inventor

David G. Dearing

Inventor
Lewisville, TX, US

Overview

5→
Patents
1986–2011
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 5 as inventor

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

E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
7,950,469'Modular well tool system'20117,694,745'Modular well tool system'20106,691,788'Retrievable packer having a positively operated support ring'20044,838,348'Well packer brake'19894,583,590'Slip releasing apparatus'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–1989Patents assigned to DRESSER IND (2)· patent assignee history
1986–1989Based in Duncanville, TX, US· patent location history
2004–2011Patents assigned to HALLIBURTON ENERGY SERV INC (3)· patent assignee history
2004Based in Carrollton, TX, US· patent location history
2010–2011Based in Lewisville, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HALLIBURTON ENERGY SERV INC32004–2011
DRESSER IND21986–1989
Locations
LocationPatentsSpan
Lewisville, Texas, US22010–2011
Duncanville, Texas, US21986–1989
Carrollton, Texas, US12004