Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5657007 | Dumpster alarm system | Patrick E. Powers | 1997-08-12 |
| RE35473 | Sludge flow measuring system | Edward A. Oakley, Harry K. Crow, Richard T. Atherton, Berthold A. Fehn | 1997-03-11 |