Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11344752 | System and method for monitoring a service life of a filter with a respirator filter sampling port assembly | Frank Ding, Michael Parham | 2022-05-31 |
| 10744352 | Half facepiece | Carl Estcourt Tucker, John Slemmen, Gareth Dyfan Evans, Garath Tudor Roberts, Chris Ward +5 more | 2020-08-18 |
| 10556136 | Half facepiece | Antti SEPPÄLÄ, Amy Elizabeth Quiring, Michael Parham | 2020-02-11 |
| 10166417 | Respirator having an integrated oronasal mask | Grant Stuart Richardson | 2019-01-01 |
| 9968806 | Carrying plate for breathing apparatus | Graham Langford, John P. Kearns | 2018-05-15 |
| 9604080 | Carrying plate for breathing apparatus | Graham Langford, John P. Kearns | 2017-03-28 |
| 9132299 | Respirator having an integrated oronasal mask | Grant Stuart Richardson | 2015-09-15 |
| D358213 | Medical filter | Brian Whitehead | 1995-05-09 |
| 4810362 | Method for cleaning fossil fuel, such as coal and crude oil | — | 1989-03-07 |
| 4797137 | Apparatus for cleaning fossil fuel, such as coal and crude oil | — | 1989-01-10 |