Issued Patents All Time
Showing 25 most recent of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1095456 | Cable guide | Patrick R. McKellips | 2025-09-30 |
| D1068124 | Bracket for headgear | Patrick R. McKellips | 2025-03-25 |
| D1055002 | Cable guide | Patrick R. McKellips | 2024-12-24 |
| D1053463 | Accessory bracket for headgear | Patrick R. McKellips | 2024-12-03 |
| 12128259 | Respirator negative pressure fit check devices and methods | William A. Mittelstadt, Carl W. Raines, III, David R. Stein, Nathan A. Abel, Michael J. Cowell +6 more | 2024-10-29 |
| D1035593 | Cable guide | Patrick R. McKellips | 2024-07-16 |
| 11865375 | Respirator fit check sealing devices and methods | William A. Mittelstadt, Thomas W. Holmquist-Brown, Adam J. Cernohous, Michael J. Cowell | 2024-01-09 |
| 11571591 | Respirator with floating elastomeric sleeve | — | 2023-02-07 |
| 11219787 | Respirator fit check sealing devices and methods | William A. Mittelstadt, Thomas W. Holmquist-Brown, Adam J. Cernohous, Michael J. Cowell | 2022-01-11 |
| 11052268 | Respirator negative pressure fit check devices and methods | William A. Mittelstadt, Carl W. Raines, III, David R. Stein, Nathan A. Abel, Michael J. Cowell +6 more | 2021-07-06 |
| 10786692 | Respirator with floating elastomeric sleeve | — | 2020-09-29 |
| 10765176 | Personal protective device strap connecting buckle assembly | David M. Castiglione, David R. Stein, Michael J. Cowell | 2020-09-08 |
| 10391338 | Sleeve-fit respirator cartridge | Michael J. Cowell, William A. Mittelstadt, Carl W. Raines, III, Nathan A. Abel | 2019-08-27 |
| 9950202 | Respirator negative pressure fit check devices and methods | William A. Mittelstadt, Carl W. Raines, III, David R. Stein, Nathan A. Abel, Michael J. Cowell +3 more | 2018-04-24 |
| 9814913 | Respirator with floating elastomeric sleeve | — | 2017-11-14 |
| 9744328 | Air filtration device having tuned air distribution system | Britton G. Billingsley, Joy L. Manske | 2017-08-29 |
| 9744329 | Air filtration device having subsections lacking fluid communication | Britton G. Billingsley, Joy L. Manske | 2017-08-29 |
| D795415 | Respirator cartridge having an engagement latch | Gary E. Dwyer | 2017-08-22 |
| D795416 | Respirator mask | Michael J. Cowell, Carl W. Raines, III | 2017-08-22 |
| D786443 | Filter element | Elizabeth D. Cadogan, John S. Huberty, Michael J. Thuente | 2017-05-09 |
| D779674 | Filter element having a connector | Elizabeth D. Cadogan, John S. Huberty, Ryan D. Kracht, William A. Mittelstadt, Michael J. Svendsen +1 more | 2017-02-21 |
| D778430 | Filter cartridge | Gary E. Dwyer, Pierre Legare, Carl W. Raines, III, Serge Dubeau, Mark W. Schulz +1 more | 2017-02-07 |
| 9517367 | Respiratory mask having a clean air inlet chamber | Gary E. Dwyer, William A. Mittelstadt, Carl W. Raines, III, Nathan A. Abel, Michael J. Cowell | 2016-12-13 |
| 9510626 | Sleeve-fit respirator cartridge | Michael J. Cowell, William A. Mittelstadt, Carl W. Raines, III, Nathan A. Abel | 2016-12-06 |
| D767116 | Respirator mask having an exhalation port | William A. Mittelstadt | 2016-09-20 |