| 8790449 |
Electret webs with charge-enhancing additives |
Fuming B. Li, John M. Sebastian, Marvin E. Jones |
2014-07-29 |
| 8529671 |
Electret webs with charge-enhancing additives |
John M. Sebastian, Fuming B. Li, Marvin E. Jones, Luke T. Dressel |
2013-09-10 |
| 8517329 |
Easel stand mountable display board |
James E. Nash, Craig D. Thompson |
2013-08-27 |
| 7765698 |
Method of making electret articles based on zeta potential |
John M. Sebastian, Marvin E. Jones, Fuming B. Li, Shih-Hung Chou, Nathan E. Schultz +2 more |
2010-08-03 |
| 7493900 |
Fibrous filtration face mask having a new unidirectional fluid valve |
Vaughn B. Grannis, Harold J. Seppala, Anthony B. Ferguson |
2009-02-24 |
| 7428903 |
Fibrous filtration face mask having a new unidirectional fluid valve |
Vaughn B. Grannis, Harold J. Seppala, Anthony B. Ferguson |
2008-09-30 |
| 7311104 |
Method of making a filtering face mask that has an exhalation valve |
Vaughn B. Grannis, Harold J. Seppala, Anthony B. Ferguson |
2007-12-25 |
| 7117868 |
Fibrous filtration face mask having a new unidirectional fluid valve |
Vaughn B. Grannis, Harold J. Seppala, Anthony B. Ferguson |
2006-10-10 |
| 6854463 |
Filtering face mask that has a new exhalation valve |
Vaughn B. Grannis, Harold J. Seppala, Anthony B. Ferguson |
2005-02-15 |
| 6843248 |
Filtering face mask that has a new exhalation valve |
Vaughn B. Grannis, Harold J. Seppala, Anthony B. Ferguson |
2005-01-18 |
| 6805124 |
Face mask that has a filtered exhalation valve |
Nicole V. McCullough, Jane K. Peterson, Nicholas R. Baumann, John W. Bryant, Christopher P. Henderson +1 more |
2004-10-19 |
| 6584976 |
Face mask that has a filtered exhalation valve |
Nicole V. McCullough, Jane K. Peterson, Nicholas R. Baumann, John W. Bryant, Christopher P. Henderson +1 more |
2003-07-01 |
| 6511204 |
Light tube |
John J. Emmel, Lynette M. Miles, James E. Nash |
2003-01-28 |
| 6460539 |
Respirator that includes an integral filter element, an exhalation valve, and impactor element |
Nicole V. McCullough |
2002-10-08 |
| 5509436 |
Unidirectional fluid valve |
Vaughn B. Grannis, Harold J. Seppala, Anthony B. Ferguson |
1996-04-23 |
| RE35062 |
Filter element |
Gerald M. Brostrom, Sabrina M. Yard |
1995-10-17 |
| 5325892 |
Unidirectional fluid valve |
Vaughn B. Grannis, Harold J. Seppala, Anthony B. Ferguson |
1994-07-05 |
| D347299 |
Valve cover |
John W. Bryant, Alan G. Kellett, Richard Lees, David C. Byram |
1994-05-24 |
| D347298 |
Valve cover |
David C. Byram, James E. Steffen |
1994-05-24 |
| 4886058 |
Filter element |
Gerald M. Brostrom, Sabrina M. Yard |
1989-12-12 |
| 4883547 |
Method of forming a high efficiency respirator |
— |
1989-11-28 |
| 4827924 |
High efficiency respirator |
— |
1989-05-09 |
