Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7493900 | Fibrous filtration face mask having a new unidirectional fluid valve | Daniel A. Japuntich, Harold J. Seppala, Anthony B. Ferguson | 2009-02-24 |
| 7428903 | Fibrous filtration face mask having a new unidirectional fluid valve | Daniel A. Japuntich, Harold J. Seppala, Anthony B. Ferguson | 2008-09-30 |
| 7311104 | Method of making a filtering face mask that has an exhalation valve | Daniel A. Japuntich, Harold J. Seppala, Anthony B. Ferguson | 2007-12-25 |
| 7117868 | Fibrous filtration face mask having a new unidirectional fluid valve | Daniel A. Japuntich, Harold J. Seppala, Anthony B. Ferguson | 2006-10-10 |
| 6854463 | Filtering face mask that has a new exhalation valve | Daniel A. Japuntich, Harold J. Seppala, Anthony B. Ferguson | 2005-02-15 |
| 6843248 | Filtering face mask that has a new exhalation valve | Daniel A. Japuntich, Harold J. Seppala, Anthony B. Ferguson | 2005-01-18 |
| 6216693 | Respirator having a compressible press fir filter element | Peter O. Rekow, Thomas W. Holmquist-Brown, David L. Braun | 2001-04-17 |
| D426298 | Full-face respirator lens | David P. Knivsland, Joseph G. Reischel, Gerald M. Brostrom, David C. Byram | 2000-06-06 |
| 5924420 | Full face respirator mask having integral connectors disposed in lens area | Joseph G. Reischel, David P. Knivsland | 1999-07-20 |
| D409744 | Full face respirator lens | David P. Knivsland, Joseph G. Reischel, Gerald M. Brostrom, David C. Byram | 1999-05-11 |
| D388872 | Full face respirator lens | David P. Knivsland, Joseph G. Reischel, Gerald M. Brostrom, David C. Byram | 1998-01-06 |
| D379160 | Buckle | Ronald C. Johansson, Gerald M. Brostrom | 1997-05-13 |
| D378610 | Full face respirator | Joseph G. Reischel, David P. Knivsland, Gerald M. Brostrom, David C. Byram | 1997-03-25 |
| 5509436 | Unidirectional fluid valve | Daniel A. Japuntich, Harold J. Seppala, Anthony B. Ferguson | 1996-04-23 |
| 5325892 | Unidirectional fluid valve | Daniel A. Japuntich, Harold J. Seppala, Anthony B. Ferguson | 1994-07-05 |
| 4997034 | Heat exchanger | James E. Steffen, Frank Schröder | 1991-03-05 |