Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7523300 | Communication systems | — | 2009-04-21 |
| 5685153 | Efficient utilization of chlorine and/or moisture-containing fuels and wastes | Norman L. Dickinson, Michael K. Klosky | 1997-11-11 |
| 5322564 | Method and apparatus for applying viscous material to a substrate | Ralf Ludwig, Wolfgang Rosteck, Heinz Wessel | 1994-06-21 |
| 4477257 | Apparatus and process for thermal treatment of organic carbonaceous materials | Edward Koppelman | 1984-10-16 |
| 4330032 | Self-cleaning screw conveyor | Edward Koppelman | 1982-05-18 |
| 4220458 | Filter apparatus | Edward Koppelman, Charles E. Lapple, A. K. V. Subba Rao | 1980-09-02 |
| 4201512 | Radially staged drag turbine | Chester W. Marynowski, F. Michael Lewis, Charles E. Lapple, Konrad T. Semrau | 1980-05-06 |