| 12337200 |
Respirator apparatus |
Ken Kershner, Paul M. Newby, Chelsea Harrison Ramm |
2025-06-24 |
| 11642487 |
Reusable respiratory protection device |
Brian K. Heimbuch, Delbert A. Harnish, Geoffrey A. Kibble, Thomas B. Stephenson, Sheila J. Nogueira-Prewitt +3 more |
2023-05-09 |
| 10835704 |
Reusable respiratory protection device |
Brian K. Heimbuch, Delbert A. Harnish, Geoffrey A. Kibble, Thomas B. Stephenson, Sheila J. Nogueira-Prewitt +3 more |
2020-11-17 |
| 9352268 |
Filter asssembly for a respirator |
Richard A. Fiet, James D. Wilcox |
2016-05-31 |
| 8974569 |
Multi-flow filtration system |
Paul A. Matula, Dominick Mastri, James R. Parys, Ralph Stearns, Johnnie H. Copley |
2015-03-10 |
| RE44972 |
Multi-flow filtration system |
Paul A. Matula, Dominick Mastri, James R. Parys, Ralph Stearns, Johnnie H. Copley |
2014-07-01 |
| D692555 |
Respiratory device filter |
Geoffrey Nicholas Maksym, Ewan Kearney MacKenzie, Guy Drapeau |
2013-10-29 |
| 8088189 |
Multi-flow filtration system |
Paul A. Matula, Dominick Mastri, James R. Parys, Ralph Stearns, Johnnie H. Copley |
2012-01-03 |
| 7976598 |
Multi-flow filtration system |
Paul A. Matula, Dominick Mastri, James R. Parys, Ralph Stearns, Johnnie H. Copley |
2011-07-12 |
| 6783566 |
Combination filter/cartridge assembly |
— |
2004-08-31 |
| 5232265 |
Vertical back adjust for chairs |
Michael H. Estkowski |
1993-08-03 |
| 5230571 |
Caster bearing assembly |
Michael H. Estkowski |
1993-07-27 |
| 5226739 |
Integral retainer and bearing assembly |
Michael H. Estkowski |
1993-07-13 |
| 5075924 |
Tilted axle multiple wheel caster |
Michael H. Estkowski |
1991-12-31 |
| 5068943 |
Dual wheel tilted axle caster with an integral retainer and bearing assembly |
Michael H. Estkowski, Michael Gaishin |
1991-12-03 |
| D321299 |
Chair base |
Jerome Caruso, Lennard V. Lastuck |
1991-11-05 |
| D308815 |
Caster with arcurate hood cover |
Jerome Caruso, Lennard V. Lastuck |
1990-06-26 |
| 4763383 |
Electrically conductive caster having loop depending rings |
Michael H. Estkowski, Robert M. Shane |
1988-08-16 |
| 4696394 |
Easily removable protective covering for annular objects |
Michael H. Estkowski, Robert S. Doumani |
1987-09-29 |