LexDanaLexDanabeta
Inventor

Charles W. Calhoun

Inventor
Jackson, WY, US

Overview

2→
Patents
1978–1980
Patent span
Performing operations
Primary field (CPC B)

Patents· 2 as inventor

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

B23Pprimary
B23PMetal-working not otherwise provided for40%
E21BEarth or rock drilling40%
B25BTools or bench devices not otherwise provided for, for fastening, connecting, disengaging, or holding20%
PatentTitleYear
4,199,032'Apparatus for measuring and controlling a force'19804,091,451'Method of and apparatus for making up a threaded connection'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1980Patents assigned to WEATHERFORD LAMB (2)· patent assignee history
1978Based in Houston, TX, US· patent location history
1980Based in Jackson, WY, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
WEATHERFORD LAMB21978–1980
Locations
LocationPatentsSpan
Jackson, WY, US11980
Houston, Texas, US11978