Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6732733 | Half-mask respirator with head harness assembly | David M. Castiglione, William A. Mittelstadt, Alan J. Solyntjes | 2004-05-11 |
| 6457473 | Drop-down face mask assembly | David C. Byram | 2002-10-01 |
| D426298 | Full-face respirator lens | Vaughn B. Grannis, David P. Knivsland, Joseph G. Reischel, David C. Byram | 2000-06-06 |
| 6062221 | Drop-down face mask assembly | David C. Byram | 2000-05-16 |
| D421801 | Carriage for drop-down mask assembly | David C. Byram | 2000-03-21 |
| D421299 | Carriage for drop-down mask assembly | David C. Byram | 2000-02-29 |
| 6016805 | Face seal for respirator | James A. Burns | 2000-01-25 |
| D409744 | Full face respirator lens | Vaughn B. Grannis, David P. Knivsland, Joseph G. Reischel, David C. Byram | 1999-05-11 |
| D388872 | Full face respirator lens | Vaughn B. Grannis, David P. Knivsland, Joseph G. Reischel, David C. Byram | 1998-01-06 |
| D379160 | Buckle | Ronald C. Johansson, Vaughn B. Grannis | 1997-05-13 |
| D378610 | Full face respirator | Joseph G. Reischel, David P. Knivsland, David C. Byram, Vaughn B. Grannis | 1997-03-25 |
| 5481763 | Molded head harness | David C. Byram | 1996-01-09 |
| RE35062 | Filter element | Daniel A. Japuntich, Sabrina M. Yard | 1995-10-17 |
| 5394568 | Molded head harness | David C. Byram | 1995-03-07 |
| 4886058 | Filter element | Daniel A. Japuntich, Sabrina M. Yard | 1989-12-12 |