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Inventor

Robert W. Dinning

Inventor
Houston, TX, US

Overview

7→
Patents
1976–2000
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 7 as inventor

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

E21Bprimary
E21BEarth or rock drilling50%
F04BPositive-displacement machines for liquids33%
F04FPumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped8%
Y10TTechnical subjects covered by former us classification8%
PatentTitleYear
6,045,335'Differential pressure operated free piston for lifting well fluids'20005,427,504'Gas operated plunger for lifting well fluids'19954,923,372'Gas lift type casing pump'19904,765,403'Apparatus for placing and removing well flow control devices'19884,114,694'No-shock pressure plug apparatus'19783,963,377'Pneumatically powered pump system'19763,937,280'Artificial lift well apparatus'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2000Based in Houston, TX, US· patent location history
1978Patents assigned to BROWN OIL TOOLS (1)· patent assignee history
1988Patents assigned to CRAWFORD DOUGLAS W (1)· patent assignee history
1988Patents assigned to CRAWFORD WILLIAM B (1)· patent assignee history
1988Patents assigned to DINNING ROBERT W (1)· patent assignee history
1990Patents assigned to FERGUSON BEAUREGARD INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BROWN OIL TOOLS11978
CRAWFORD DOUGLAS W11988
CRAWFORD WILLIAM B11988
DINNING ROBERT Wself11988
FERGUSON BEAUREGARD INC11990
Locations
LocationPatentsSpan
Houston, Texas, US71976–2000