LexDanaLexDanabeta
Inventor

Craig D. Hines

Inventor
Carrollton, TX, US

Overview

5→
Patents
1989–1994
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 5 as inventor

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

E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
5,323,859'Streamlined flapper valve'19945,318,127'Surface controlled annulus safety system for well bores'19945,137,089'Streamlined flapper valve'19924,842,074'Gas storage well safety system and method'19894,834,183'Surface controlled subsurface safety valve'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–1992Patents assigned to OTIS ENG CO (3)· patent assignee history
1989–1994Based in Carrollton, TX, US· patent location history
1994Patents assigned to HALLIBURTON CO (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
OTIS ENG CO31989–1992
HALLIBURTON CO21994
Locations
LocationPatentsSpan
Carrollton, Texas, US51989–1994