Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5364130 | Coupling for tubular plastic pipes with liner of socket and liner of pipes being heat weldable | — | 1994-11-15 |
| 4825543 | Tool assembly for circumferential cutting of cylindrical pipe members | Jurg Thalmann | 1989-05-02 |
| 4697831 | Prefabricated assembly for high tensile strength pipe connections | — | 1987-10-06 |
| 4670078 | Process for heat-sealing thermoplastic conduits | Ernesto Lehmann | 1987-06-02 |
| 4655480 | Molded tapping member formed of a weldable plastics material | — | 1987-04-07 |
| 4642154 | Method and apparatus for welding conduits | Ernesto Lehmann, Emil Roth, Walter Gerber | 1987-02-10 |
| 4624487 | Molded tapping fitting for connecting a branch line to a pipeline | — | 1986-11-25 |
| 4618168 | Apparatus for the heat-sealing thermoplastic conduits with a bridging conductor | Ernesto Lehmann | 1986-10-21 |
| 4536644 | Arrangement for welding together thermoplastic molded members | — | 1985-08-20 |
| 4515177 | Molded connection piece | Fritz Reich | 1985-05-07 |
| 4449038 | Apparatus for welding a joint between plastic pipes | Fritz Reich | 1984-05-15 |
| 4436987 | Weld connection for plastic pipe | Fritz Reich | 1984-03-13 |
| 4432572 | Flange connection | — | 1984-02-21 |
| 4365144 | Apparatus for welding a joint between plastic pipes | Fritz Reich | 1982-12-21 |
| 4362684 | Process and apparatus for making a welding sleeve | — | 1982-12-07 |