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Inventor

Edwin K. Roberts

Inventor
Fort Worth, TX, US

Overview

8→
Patents
1998–2019
Patent span
Physics
Primary field (CPC G)

Patents· 8 as inventor

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

G01Vprimary
G01VGeophysics40%
E21BEarth or rock drilling35%
G01NInvestigating or analysing materials by determining their chemical or physical properties15%
G10KSound-producing devices5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
PatentTitleYear
10,358,905Ultrasonic logging methods and apparatus for measuring cement and casing properties using acoustic echoes201910,174,604Ultrasonic cement and casing thickness evaluation20198,824,240'Apparatus and method for measuring the acoustic impedance of wellbore fluids'20147,471,591'Method and apparatus for azimuthal logging of shear waves in boreholes using optionally rotatable transmitter and receiver assemblies'20086,538,958'Method and apparatus for acoustics logging of fluid density and wet cement plugs in boreholes'20036,189,383'Method and apparatus for acoustic logging of fluid density and wet cement plugs in boreholes'20016,050,141'Method and apparatus for acoustic logging of fluid density and wet cement plugs in boreholes'20005,728,978'Acoustic isolator for acoustic well logging tool'1998

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1998Patents assigned to COMPUTALOG USA INC (1)· patent assignee history
1998–2008Based in Fort Worth, TX, US· patent location history
2000Patents assigned to COMPUTALOG RESEARCH INC (1)· patent assignee history
2001–2003Patents assigned to COMPUTALOG RES INC (2)· patent assignee history
2008Patents assigned to PRECISION ENERGY SERVICES INC (1)· patent assignee history
2014–2019Based in Benbrook, TX, US· patent location history
2019Patents assigned to WEATHERFORD TECH HOLDINGS LLC (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
COMPUTALOG RES INC22001–2003
WEATHERFORD TECH HOLDINGS LLC22019
COMPUTALOG RESEARCH INC12000
COMPUTALOG USA INC11998
PRECISION ENERGY SERVICES INC12008
Locations
LocationPatentsSpan
Fort Worth, Texas, US51998–2008
Benbrook, Texas, US32014–2019