Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7504015 | Method and device for producing oxygen | Karl Hecker, Stefan Fiedler | 2009-03-17 |
| 6595214 | Nasal respiration mask | Karl Hecker | 2003-07-22 |
| 6427694 | Nasal breathing mask | Karl Hecker | 2002-08-06 |
| D439326 | Nasal respiration mask | Karl Hecker | 2001-03-20 |
| 5957128 | Method and device for determination of the functional residual capacity (FRC) | Karl Hecker, Thomas Wagner | 1999-09-28 |
| 5875774 | Nebulizer | Francis J. Clementi, Raymond C. Hoffman, Karl Hecker | 1999-03-02 |
| 4202618 | Electrostatic copying machine having flash-discharge-lamp fixing unit | Fritz Waschk, Heinz Webersik | 1980-05-13 |