Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D469580 | Red helmet respiratory protection device | David R. Schlaefer | 2003-01-28 |
| D436234 | Green helmet respiratory protection device | David R. Schlaefer | 2001-01-09 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D469580 | Red helmet respiratory protection device | David R. Schlaefer | 2003-01-28 |
| D436234 | Green helmet respiratory protection device | David R. Schlaefer | 2001-01-09 |