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Inventor

Jim R. Williamson

Inventor
Carrollton, TX, US

Overview

4→
Patents
1978–1997
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 4 as inventor

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

E21Bprimary
E21BEarth or rock drilling67%
B25CHand-held nailing or stapling tools17%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%
PatentTitleYear
5,617,918'Wellbore lock system and method of use'19974,144,937'Valve closing method and apparatus for use with an oil well valve'19794,113,018'Oil well testing safety valve'19784,109,725'Self adjusting liquid spring operating apparatus and method for use in an oil well valve'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1997Patents assigned to HALLIBURTON CO (4)· patent assignee history
1978–1997Based in Carrollton, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HALLIBURTON CO41978–1997
Locations
LocationPatentsSpan
Carrollton, Texas, US41978–1997