LexDanaLexDanabeta
Inventor

Mike H. Johnson

Inventor
Spring, TX, US

Overview

3→
Patents
1999–2002
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 3 as inventor

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

E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
6,401,840'Method of extracting and testing a core from a subterranean formation'20026,148,933'Steering device for bottomhole drilling assemblies'20005,957,221'Downhole core sampling and testing apparatus'1999

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1999–2002Patents assigned to BAKER HUGHES INC (3)· patent assignee history
1999–2002Based in Spring, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BAKER HUGHES INC31999–2002
Locations
LocationPatentsSpan
Spring, Texas, US31999–2002