Inventor
Lothar H. Waldes
Inventor
Salt Lake City, UT, US
Overview
Patents· 1 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
4,278,138'Composite heavy metal drill collar'1981Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1981Patents assigned to CHRISTENSEN INC (1)· patent assignee history
1981Based in Salt Lake City, UT, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CHRISTENSEN INC | 1 | 1981 |
Locations
| Location | Patents | Span |
|---|---|---|
| Salt Lake City, UT, US | 1 | 1981 |