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Inventor

Leo L. Roberts

Inventor
Claremore, OK, US

Overview

4→
Patents
1977–1984
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 4 as inventor

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

F04Dprimary
F04DNon-positive-displacement pumps25%
F05DIndexing scheme for aspects relating to non-positive-displacement machines or engines, gas-turbines or jet-propulsion plants13%
F16CShafts13%
H02KDynamo-electric machines13%
LOCD113%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%
Y10TTechnical subjects covered by former us classification13%
PatentTitleYear
4,483,660'Submersible pump impeller locking method'19844,275,938'Tandem thrust bearing'19814,135,863'Impeller for a magnetically coupled pump'1979D0244750'Pump'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1979Patents assigned to LITTLE GIANT CORP (2)· patent assignee history
1977–1979Based in Moore, OK, US· patent location history
1981Patents assigned to HUGHES CENTRILIFT (1)· patent assignee history
1981–1984Based in Claremore, OK, US· patent location history
1984Patents assigned to HUGHES TOOL CO (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
LITTLE GIANT CORP21977–1979
HUGHES CENTRILIFT11981
HUGHES TOOL CO11984
Locations
LocationPatentsSpan
Claremore, OK, US21981–1984
Moore, OK, US21977–1979