LexDanaLexDanabeta
Inventor

Earl T. Koskie, Jr.

Inventor
Conroe, TX, US

Overview

2→
Patents
1980–1990
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 2 as inventor

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

E21Bprimary
E21BEarth or rock drilling40%
F16CShafts20%
F16JPistons20%
Y10TTechnical subjects covered by former us classification20%
PatentTitleYear
4,930,587'Coring tool'19904,209,890'Method of making a rotary rock bit with seal recess washer'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980Patents assigned to DRESSER IND (1)· patent assignee history
1980Based in Casper, WY, US· patent location history
1990Patents assigned to DIAMANT BOART STRATABIT USA (1)· patent assignee history
1990Based in Conroe, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DIAMANT BOART STRATABIT USA11990
DRESSER IND11980
Locations
LocationPatentsSpan
Conroe, Texas, US11990
Casper, WY, US11980