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Inventor

Gary D. Ellis

Inventor
Richardson, TX, US

Overview

8→
Patents
1976–2013
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 8 as inventor

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

E21Bprimary
E21BEarth or rock drilling89%
Y10TTechnical subjects covered by former us classification11%
PatentTitleYear
8,505,638'Restricted axial movement locking mechanism'20138,002,045'Downhole tool with load diverting system and method'20116,924,745'System and method for monitoring packer slippage'20054,691,775'Isolation valve with frangible flapper element'19874,372,527'Blowout preventer'19834,363,358'Subsurface tubing hanger and stinger assembly'19824,305,465'Subsurface tubing hanger and stinger assembly'19813,951,211'Method for selectively retrieving a plurality of well packers'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1987Patents assigned to DRESSER IND (5)· patent assignee history
1976Based in Dallas, TX, US· patent location history
1981–2005Based in Richardson, TX, US· patent location history
2005–2013Patents assigned to HALLIBURTON ENERGY SERV INC (3)· patent assignee history
2011–2013Based in Plano, TX, US· patent location history
2013Patents assigned to ELLIS GARY DALE (1)· patent assignee history
2013Patents assigned to EZELL MICHAEL DALE (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DRESSER IND51976–1987
HALLIBURTON ENERGY SERV INC32005–2013
ELLIS GARY DALEself12013
EZELL MICHAEL DALE12013
Locations
LocationPatentsSpan
Richardson, Texas, US51981–2005
Plano, Texas, US22011–2013
Dallas, Texas, US11976