Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6322281 | Corrosion-protected tension member of steel | Erich Richartz, Leo Werth, Werner Rempe, Volker Müller | 2001-11-27 |
| 6055691 | Method of mounting and tensioning a freely tensioned tension member and device for carrying out the method | Oswald Nutzel, Lorenz Schnitzler | 2000-05-02 |
| 5924250 | Sealing arrangement in a bundled tension member for prestressed concrete | Oswald Nutzel | 1999-07-20 |
| 5809710 | Method of tensioning a tension member composed of a plurality of individual elements | Alto Mannhart | 1998-09-22 |
| 5056284 | Bundled tensioning member for prestressing a tall structural member and method of installing same | Franz Ruckdeschel, Reinhard Klockner, Gero Herrmann | 1991-10-15 |
| 4958961 | Anchoring arrangement for a rod-shaped tension member formed of fiber reinforced composite material | Thomas Herbst | 1990-09-25 |
| 4922681 | Hot-rolled concrete reinforcing bar, in particular reinforcing ribbed bar | Dieter Russwurm | 1990-05-08 |
| 4878327 | Corrosion protected tension member for use in prestressed concrete and method of installing same | Oswald Nutzel, Egbert Zimmermann | 1989-11-07 |
| 4877463 | Method for producing rolled steel products, particularly threaded steel tension members | Max Aicher, Hans Klein, Dieter Russwurm | 1989-10-31 |
| 4856254 | Method of placing steel tendons through ducts in a concrete structural member | — | 1989-08-15 |
| 4640068 | Anchoring and coupling device for tendons in prestressed concrete | Also Mannhart | 1987-02-03 |
| 4633540 | Tension tie member | Gerd Thielen, Otmar Langwadt | 1987-01-06 |
| 4469756 | Method of and apparatus for forming an outwardly projecting bulge in a steel wire strand for forming an anchor in concrete | Lorenz Schnitzler, Alto Mannhart, Johann Wlodkowski | 1984-09-04 |
| 4410162 | Recoverable form part for use in the region where a tendon is anchored in a prestressed concrete component | Johann Wlodkowski, Oswald Nutzel | 1983-10-18 |
| 4388014 | Multiple part tapered collar for a tendon anchorage system | Johann Wlodkowski | 1983-06-14 |
| 4363462 | Recoverable formwork part for forming the anchoring location of a tendon in a concrete structural component | Johann Wlodkowski | 1982-12-14 |
| 4343122 | System for anchoring a tendon in a structural concrete unit | Johann Wlodkowski | 1982-08-10 |
| 4192114 | Arrangement for interconnecting bundles of prestressing tendons for prestressed concrete | Josef Renoth, Johann Wlodkowski | 1980-03-11 |