Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7308735 | Roller pair for stretching strips of filter material | Stefan Fietkau | 2007-12-18 |
| 6263882 | Method of and apparatus for making filter mouthpieces for rod-shaped articles of the tobacco processing industry | Stefan Fietkau, Franz Arnold | 2001-07-24 |
| 6059706 | Method of and apparatus for treating a filter tow | Stefan Fietkau, Peter-Franz Arnold | 2000-05-09 |
| 5901709 | Method of and apparatus for processing exhausted air in tobacco processing plants | Stefan Fietkau, Frank Weimann | 1999-05-11 |
| 5738115 | Method of and apparatus for decontaminating the exposed surfaces of filter mouthpieces in smokers products | Stefan Fietkau, Peter-Franz Arnold, Thomas Juschus, Clemens Schmick | 1998-04-14 |
| 5725467 | Method of and apparatus for making a tow of filter material for tobacco smoke | Stefan Fietkau, Peter-Franz Arnold | 1998-03-10 |
| 5645087 | Method of and apparatus for decontaminating the exposed surfaces of filter mouthpieces in smokers' products | Stefan Fietkau, Peter-Franz Arnold, Thomas Juschus, Clemens Schmick | 1997-07-08 |
| 5590449 | Apparatus for stretching plasticizing and gathering a tow of filter material for tobacco smoke | Stefan Fietkau, Peter-Franz Arnold | 1997-01-07 |
| 4888977 | Method of ascertaining the rate of fluid flow through the ventilation zones of rod-shaped articles of the tobacco processing industry | Franz Koch | 1989-12-26 |