Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10876048 | Beneficiation of hydrocarbons from mineral matrices | Charles A. Arnold, William E. Hahn | 2020-12-29 |
| 10829707 | Methods for reduction of pollutants from carbonaceous materials prior to combustion | Richard L. Sumner, John C. Crelling | 2020-11-10 |
| 10065193 | Processing of grains and the like | Charles A. Amold, William E. Hahn, Jeffrey A. Gwirtz, R. Carl Hoseney | 2018-09-04 |
| 8534877 | Luminaire optical systems | Kevin F. Leadford, Carl T. Gould | 2013-09-17 |
| 8106598 | Method and apparatus for assuring compliance with high efficiency lighting standards | — | 2012-01-31 |
| D567425 | Luminaire | — | 2008-04-22 |
| D557345 | Exit sign | — | 2007-12-11 |
| 7131747 | Length adjustment device for illuminated fascia | — | 2006-11-07 |
| 6550489 | Recirculating, low pressure hot water parts washing apparatus | — | 2003-04-22 |
| 6361193 | Pull-on bifurcated clip for improved reflector trim retention | Algimantas J. Gabrius | 2002-03-26 |
| D454183 | Sink-type parts washing apparatus | Brendan Alan Carey, John A. Richards | 2002-03-05 |
| 5711509 | Isolation gate and frame assembly | — | 1998-01-27 |
| 5662414 | Thermoplastic pan assembly for mounting recessed lighting fixtures in ceilings and the like | Mark E. Jennings, Greg D. Yates | 1997-09-02 |
| 5060338 | Wet mop with self-contained wringer | Enzo Berti | 1991-10-29 |