Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4710245 | Method of making tubular units for the oil and gas industry | — | 1987-12-01 |
| 4326699 | Oil-tempering apparatus for pipes | Wilfried Carneim, Herbert Hillemanns, Hermann Vollmecke, Hans Ribken, Heinz J. Schumacher | 1982-04-27 |