Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8231008 | Column flotation cell for enhanced recovery of minerals such as phosphates by froth flotation | Stanley A. Patterson, David R. Spedden, David Kennedy | 2012-07-31 |
| 7510083 | Column flotation cell for enhanced recovery of minerals such as phosphates by froth flotation | Stanley A. Patterson, David R. Spedden, David Kennedy | 2009-03-31 |