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Inventor

John M. Richardson

Inventor
Duncan, OK, US

Overview

6→
Patents
1988–1994
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 6 as inventor

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

E21Bprimary
E21BEarth or rock drilling67%
G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure17%
G01VGeophysics17%
PatentTitleYear
5,355,951'Method of evaluating oil or gas well fluid process'19945,337,234'Self-contained downhole gauge system'19945,153,832'Self-containing downhole gauge system'19924,869,097'Sonic gas pressure gauge'19894,866,607'Self-contained downhole gauge system'19894,718,027'Dynamically adjustable linear data discriminator'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988–1994Patents assigned to HALLIBURTON CO (5)· patent assignee history
1988–1994Based in Duncan, OK, US· patent location history
1989Patents assigned to ROCKWELL INTERNATIONAL CORP (1)· patent assignee history
1989Based in Malibu, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HALLIBURTON CO51988–1994
ROCKWELL INTERNATIONAL CORP11989
Locations
LocationPatentsSpan
Duncan, OK, US51988–1994
Malibu, California, US11989