Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5023059 | Recovery of metal values and hydrofluoric acid from tantalum and columbium waste sludge | Edwin J. Bielecki, Karl A. Romberger, Bart F. Bakke, Charles R. Clark | 1991-06-11 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5023059 | Recovery of metal values and hydrofluoric acid from tantalum and columbium waste sludge | Edwin J. Bielecki, Karl A. Romberger, Bart F. Bakke, Charles R. Clark | 1991-06-11 |