LexDanaLexDanabeta
Inventor

Craig L. Zitterich

Inventor
Corinth, TX, US

Overview

6→
Patents
1988–2004
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 drilling83%
G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure17%
PatentTitleYear
6,823,711'Static and dynamic calibration of quartz pressure transducers'20045,375,658'Shut-in tools and method'19945,332,035'Shut-in tools'19945,279,363'Shut-in tools'19945,234,057'Shut-in tools'19934,790,378'Well testing apparatus'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988Patents assigned to OTIS ENG CO (1)· patent assignee history
1988Based in Carrollton, TX, US· patent location history
1993–1994Patents assigned to HALLIBURTON CO (4)· patent assignee history
1993–2004Based in Corinth, TX, US· patent location history
2004Patents assigned to HALLIBURTON ENERGY SERV INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HALLIBURTON CO41993–1994
HALLIBURTON ENERGY SERV INC12004
OTIS ENG CO11988
Locations
LocationPatentsSpan
Corinth, Texas, US51993–2004
Carrollton, Texas, US11988