Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D471627 | Respirator facemask assembly | William A. Mittelstadt, Casey L. Carlson | 2003-03-11 |
| D467656 | Respirator facemask | William A. Mittelstadt, Casey L. Carlson | 2002-12-24 |
| D456505 | Grill pattern on air filter inlet | Jon Robert Wolf, Paul Johnson, Brian S. McGinley, Benjamin James Cullen, Raymond Odell | 2002-04-30 |
| 6279570 | Filter support, assembly and system | William A. Mittelstadt | 2001-08-28 |
| D444218 | Portion of a filter support | William A. Mittelstadt | 2001-06-26 |
| D412573 | Nose clip for a filtering face mask | — | 1999-08-03 |
| 5558089 | Respirator nose clip | — | 1996-09-24 |