Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1094903 | Welding attachment for a respirator | John M. Pilgrim, Jacob P. Vanderheyden | 2025-09-23 |
| 12173153 | Dual-molded polyamide-silicone composite article and methods of making | Ramnath Subramaniam, Joseph S. Warner, Michael J. Svendsen | 2024-12-24 |
| 12029926 | Respiratory protection device positive pressure seal check methods and devices | Thomas R. Braxton, II | 2024-07-09 |
| 12017095 | Respirator configured to accept vision-protecting module | — | 2024-06-25 |
| D1029244 | Bracket for respiratory sensing device | Jacob P. Vanderheyden, John M. Pilgrim, Graham Peter Wilson, Simon Matthew Pougher, Samuel Wyn Jones | 2024-05-28 |
| 11992078 | Headwear suspension attachment element | Michael J. Cowell, Nathan A. Abel, William A. Mittelstadt, Jill E. Gulliver, Ian Kelsall +3 more | 2024-05-28 |
| 11020619 | Multiple chamber respirator sealing devices and methods | — | 2021-06-01 |
| 10765176 | Personal protective device strap connecting buckle assembly | David M. Blomberg, David R. Stein, Michael J. Cowell | 2020-09-08 |
| D890916 | Full face respirator front cover | Jacob P. Vanderheyden, Thomas R. Braxton, II | 2020-07-21 |
| D842982 | Hardhat suspension adapter for half facepiece respirators | — | 2019-03-12 |
| D827810 | Hardhat suspension adapter for half facepiece respirators | — | 2018-09-04 |
| D816209 | Respirator inlet port connection seal | — | 2018-04-24 |
| 9700743 | Respiratory assembly including latching mechanism | James R. Betz, Matthew D. Reier | 2017-07-11 |
| 9259676 | Refillable filter system | Britton G. Billingsley, Gary E. Dwyer, Pierre Legare | 2016-02-16 |
| 8839785 | Respirator harness having collapsible head cradle | William A. Mittelstadt, Thomas W. Holmquist-Brown | 2014-09-23 |
| D652507 | Respirator mask body | William A. Mittelstadt, Joan K. Henry, Nathan A. Abel | 2012-01-17 |
| 8074648 | Respiratory protection device | James R. Betz, Brandon H. Harmon, Andrew S. Viner, Scott A. Larson | 2011-12-13 |
| 7849856 | Respirator valve | William A. Mittelstadt, Thomas I. Insley | 2010-12-14 |
| 7594510 | Respiratory protection device | James R. Betz, Brandon H. Harmon, Andrew S. Viner, Scott A. Larson | 2009-09-29 |
| D568986 | Strap carriers on a respirator | Thomas W. Holmquist-Brown, John M. Pilgrim, James R. Betz, Sean M. Burke, Alan J. Solyntjes +1 more | 2008-05-13 |
| 7302951 | Unidirectional respirator valve | William A. Mittelstadt | 2007-12-04 |
| 6883518 | Unidirectional respirator valve | William A. Mittelstadt | 2005-04-26 |
| 6732733 | Half-mask respirator with head harness assembly | Gerald M. Brostrom, William A. Mittelstadt, Alan J. Solyntjes | 2004-05-11 |
| 6729332 | Retention assembly with compression element and method of use | — | 2004-05-04 |
| 6705317 | Retention assembly with compression element and method of use | — | 2004-03-16 |