Inventor
Johann Wassen
Inventor
Brackwede, DT
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B21Cprimary
B21CManufacture of metal sheets, wire, rods, tubes, profiles or like semi-manufactured products otherwise than by rolling50%
B21BRolling of metal17%
B23DPlaning17%
G01BMeasuring length, thickness or similar linear dimensions17%
PatentTitleYear
4,038,550'Method and an apparatus for the measuring of the wall thickness of a tube'19774,006,622'Continuous process for the production of very long precision tubes and installation for carrying out the process'19773,963,514'Removal of excess metal from the welding seam in the interior of a pipe'19763,950,978'Stretch-forming of long tubes'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1977Patents assigned to MANNESMANN ROEHREN WERKE AG (4)· patent assignee history
1976–1977Based in Brackwede, DT· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MANNESMANN ROEHREN WERKE AG | 4 | 1976–1977 |
Locations
| Location | Patents | Span |
|---|---|---|
| Brackwede, DT | 4 | 1976–1977 |