Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8061477 | Acoustic management of fluid flow within a duct | W. Forrest Frantz, Douglas D. Maben, Clifford J. Petersen, David V. Algas | 2011-11-22 |
| 7878550 | Apparatus, system, and method for joining and sealing conduits | Alfred R. Wiratunga, Clifford J. Petersen | 2011-02-01 |