Issued Patents All Time
Showing 1–25 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10583596 | Injection head for an apparatus for the production of a twin-wall pipe | — | 2020-03-10 |
| 8899956 | Device for producing pipes made of thermoplastic | — | 2014-12-02 |
| 8794948 | Apparatus for the continuous production of a twin wall pipe with an integral socket | — | 2014-08-05 |
| 8783299 | Method of and apparatus for continuously producing a twin-wall pipe comprising pipe socket and twin-wall pipe | — | 2014-07-22 |
| 8178034 | Method and device for the continuous production of a plastic compound pipe comprising a pipe socket | — | 2012-05-15 |
| 7600793 | Twin-wall pipe with a ventilation zone between a socket and an adjacent elevation | — | 2009-10-13 |
| 7517210 | Apparatus for the manufacture of compound pipes | — | 2009-04-14 |
| 7238317 | Method of continuously producing a twin-wall pipe with a ventilation zone between a socket and an adjacent elevation | — | 2007-07-03 |
| 6939503 | Method and apparatus for the manufacture of pipes of thermoplastics with transverse profile features | — | 2005-09-06 |
| 6773253 | Device for producing profiled tubes consisting of synthetic material | — | 2004-08-10 |
| 6578608 | Pipe construction kit | — | 2003-06-17 |
| 6457965 | Apparatus for the manufacture of corrugated plastic pipes | — | 2002-10-01 |
| 6458311 | Method for the continuous manufacture of a twin-wall pipe having a pipe socket | — | 2002-10-01 |
| 6343623 | Sealing ring for connecting the spigot of a corrugated pipe with a pipe socket having a smooth inside wall | — | 2002-02-05 |
| 6323425 | Method of producing a one-piece corrugated jacket pipe from thermoplastic and method of inserting at least one electric line into such a corrugated jacket pipe | Maximilian Groebmair | 2001-11-27 |
| 6079451 | Integral corrugated jacket pipe and method of producing the same | — | 2000-06-27 |
| 6044591 | Drain and inspection manhole for liquid conduits and manhole section therefor | — | 2000-04-04 |
| 6045347 | Apparatus for the production of plastic compound pipes | — | 2000-04-04 |
| 5996635 | Composite pipe with a socket and method for its manufacture | — | 1999-12-07 |
| 5992469 | Composite pipe with integral socket | — | 1999-11-30 |
| 5976298 | Method of producing multilayer thermoplastic pipe | Wilhelm Hegler | 1999-11-02 |
| 5953974 | Apparatus for cutting slots in corrugated and twin-wall pipes | Wilhelm Hegler | 1999-09-21 |
| 5693347 | Apparatus for the manufacture of pipes of thermoplastic plastics having transverse profile features | — | 1997-12-02 |
| 5560941 | Apparatus for the manufacture of corrugated pipes of thermoplastic plastics | Wilhelm Hegler | 1996-10-01 |
| 5511964 | Apparatus for the production of plastic pipes | Wilhelm Hegler | 1996-04-30 |