Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |