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Inventor

Fred M. Winn, Jr.

Inventor
Tulsa, OK, US

Overview

3→
Patents
1978–1993
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 3 as inventor

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

E21Bprimary
E21BEarth or rock drilling25%
F04BPositive-displacement machines for liquids25%
B65GTransport or storage devices, e.g. conveyors for loading or tipping, shop conveyor systems or pneumatic tube conveyors13%
F16JPistons13%
F16KValves13%
Y10TTechnical subjects covered by former us classification13%
PatentTitleYear
5,230,363'Suction valve for high pressure slurry pump'19934,572,519'Packing assembly for use in a plunger bore'19864,111,334'Ball injector'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978Patents assigned to DOW CHEMICAL CO (1)· patent assignee history
1978–1993Based in Tulsa, OK, US· patent location history
1986–1993Patents assigned to DOWELL SCHLUMBERGER INC (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DOWELL SCHLUMBERGER INC21986–1993
DOW CHEMICAL CO11978
Locations
LocationPatentsSpan
Tulsa, OK, US31978–1993