Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11865375 | Respirator fit check sealing devices and methods | William A. Mittelstadt, David M. Blomberg, Thomas W. Holmquist-Brown, Michael J. Cowell | 2024-01-09 |
| 11219787 | Respirator fit check sealing devices and methods | William A. Mittelstadt, David M. Blomberg, Thomas W. Holmquist-Brown, Michael J. Cowell | 2022-01-11 |
| 9145253 | Dispensing device with pressure release | Steven J. Maxa | 2015-09-29 |
| D621930 | Grooved piston | Steven J. Maxa | 2010-08-17 |
| D621037 | Grooved piston | Steven J. Maxa | 2010-08-03 |
| D621038 | Grooved piston | Steven J. Maxa | 2010-08-03 |
| D621039 | Grooved piston | Steven J. Maxa | 2010-08-03 |
| D621036 | Grooved piston | Steven J. Maxa | 2010-08-03 |