Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8469196 | Method and apparatus for separating metal values | — | 2013-06-25 |
| 7571814 | Method for separating metal values by exposing to microwave/millimeter wave energy | — | 2009-08-11 |
| 6923328 | Method and apparatus for separating metal values | — | 2005-08-02 |
| 6090350 | System for separating constituents from a base material | Karl Birken | 2000-07-18 |
| 5997607 | Process of condensing metal in condensation chamber | Karl Birken | 1999-12-07 |
| 5784682 | System for separating constituents from a base material | Karl Birken | 1998-07-21 |
| 5024740 | Mineral refinement by high RF energy application | Karl Birken | 1991-06-18 |
| 4894134 | Mineral refinement by high RF energy application | Karl Birken | 1990-01-16 |