| 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 |
