Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7837754 | Multi-element filter arrangement and methods | Philip Edward Johnson, David Meline Webb, David E. Carlson | 2010-11-23 |
| 7597734 | Multi-element filter arrangement and methods | Philip Edward Johnson, David Meline Webb, David E. Carlson | 2009-10-06 |