Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8287280 | Teaching aid device and method of teaching | Paula J. Wolf | 2012-10-16 |
| 7500852 | Teaching aid device and method of teaching | Paula J. Wolf | 2009-03-10 |
| 7273375 | Teaching aid device and method of teaching | Paula J. Wolf | 2007-09-25 |
| 7261104 | Respirator facepieces | Eileen Kiefer, Mark Cavaliere, Paul A. Zeller, Klaus Schmidke | 2007-08-28 |
| 6345620 | Flexible respirator filter | Thomas M. Salapow, Paul A. Zeller | 2002-02-12 |
| 5531803 | Metal cover for respirator cartridge | Thomas M. Salapow, Thomas J. Scanio, John F. Kuhn | 1996-07-02 |
| 4201119 | Filter pleating machine | — | 1980-05-06 |