LexDanaLexDanabeta
Inventor

Paul M. Shireman

Inventor
Westerville, OH, US

Overview

1→
Patents
1987
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 1 as inventor

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

F04Bprimary
F04BPositive-displacement machines for liquids33%
F16KValves33%
Y10TTechnical subjects covered by former us classification33%
PatentTitleYear
4,687,421'Frangible pressure relief disc assembly and positive displacement pumps containing the disc assembly'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987Patents assigned to DOWELL SCHLUMBERGER INC (1)· patent assignee history
1987Based in Westerville, OH, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DOWELL SCHLUMBERGER INC11987
Locations
LocationPatentsSpan
Westerville, OH, US11987