Issued Patents All Time
Showing 51–62 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7708797 | Air cleaner configured for receipt of various sized filter cartridges; components thereof; and, methods | Bradley Kuempel | 2010-05-04 |
| D468007 | Pleat spacer for air filter | Timothy J. Smith | 2002-12-31 |
| D405519 | Filter element frame member | Brad Terlson, Wallace Ronald Saldin, Eugene J. Takach | 1999-02-09 |
| 5840094 | Air filter element; assembly; and, method | Brad Terlson, Wallace Ronald Saldin, Eugene J. Takach, Timothy J. Smith | 1998-11-24 |
| 5743927 | Air filter element; assembly; and, method | — | 1998-04-28 |
| 5647356 | Respirator cartridge with sealing fit test structure and method of use | David Lee | 1997-07-15 |
| 5427597 | Layered air filter medium having improved efficiency and pleatability | — | 1995-06-27 |
| 5306321 | Layered air filter medium having improved efficiency and pleatability | — | 1994-04-26 |
| 5290345 | Refillable gas adsorption bed assembly and counterflow adsorber module | Paul Peterson, Donald R. Monson | 1994-03-01 |
| 4963171 | High efficiency filter and method of fabricating same | — | 1990-10-16 |
| 4863499 | Anti-duffusion chemical breather assembly for disk drives | — | 1989-09-05 |
| 4218223 | Pre-cleaner for combustion engines | James E. Lidstone | 1980-08-19 |