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Inventor

Vaughn D. Kennemer

Inventor
Elk City, OK, US

Overview

1→
Patents
1990
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 1 as inventor

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

E21Bprimary
E21BEarth or rock drilling50%
Y10TTechnical subjects covered by former us classification50%
PatentTitleYear
4,979,569'Dual action valve including at least two pressure responsive members'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990Patents assigned to SCHLUMBERGER TECHNOLOGY CORP (1)· patent assignee history
1990Based in Elk City, OK, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SCHLUMBERGER TECHNOLOGY CORP11990
Locations
LocationPatentsSpan
Elk City, OK, US11990