Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10159856 | Apparatus and method for replacing an air filter of an air filtration mask | Steven A Yurechko | 2018-12-25 |
| 10105557 | Valve/connection system to prevent downstream contamination from an upstream source while replacing filters | Steven A Yurechko | 2018-10-23 |