Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6405919 | Process for the continuous production of longitudinally seam-welded and corrugated metal tubes | Christian Frohne, Ernst Hoffmann, Dieter Muller | 2002-06-18 |
| 5709347 | Device for electromagnetically braking and clutching a spool | Ernst Hoffmann, Harry Staschewski | 1998-01-20 |
| 5705790 | Method of igniting a welding arc | Gunter Titze | 1998-01-06 |
| 5519268 | Oscillating system | Helmut W. Martens, Rainer Brunn | 1996-05-21 |
| 5493765 | Method for producing lengthwise waterproof cables | Gunter Titze | 1996-02-27 |
| 5440097 | Process for controlling the welding current as a function of welding speed in arc welding equipment | Jens Metz | 1995-08-08 |
| 5325693 | Apparatus for the continuous production of helical or annular corrugated metal tubes | Ernst Hoffmann, Harry Staschewski | 1994-07-05 |
| 5192850 | Process and circuit for regulating welding current and power as a function of welding speed | Rainer Brunn | 1993-03-09 |
| 5161359 | Cable stranding apparatus | Gerhard Ziemek, Ernst Hoffmann, Harry Staschewski | 1992-11-10 |
| 5153025 | Method for the continuous marking of elongated material | Rainer Brunn | 1992-10-06 |
| 4958780 | Spool driving and braking | Rainer Bruenn, Rolf Heisterhagen, Harry Staschewski | 1990-09-25 |
| 4881489 | Color coding light wave conductors | Rainer Bruenn, Harry Staschewski | 1989-11-21 |
| 4629522 | Sealing communication cable | Karl-Heinz Marx, Arnold Vogts, Friedrich Schatz, Guenter Titze | 1986-12-16 |
| 4342190 | Stranding stock of large cross sections | Gerhard Ziemek, Ernst Hoffmann, Reiner Brunn | 1982-08-03 |
| 4331281 | Process and apparatus for production of welded tubes | Friedrich Schatz, Gerhard Ziemek | 1982-05-25 |