Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9885478 | Process for generating combustible gas from organic feedstock and reactors therefor | John W. Burke, Jr., Paul Aiken | 2018-02-06 |
| 8590505 | Method of operating a compression ignition internal combustion engine | Brandon Simmons, Cheng G. Li, Clark H. Cummins | 2013-11-26 |
| 6932002 | System and method of processing solid waste | John W. Burke, Jr. | 2005-08-23 |
| 6820417 | Exhaust aftertreatment system and method for an internal combustion engine | Charles R. Schenk, Louis A. Krempel, H. Lee Fisher, Angela R. May | 2004-11-23 |
| 6668663 | Method and apparatus to determine flow rate with the introduction of ambient air | Louis A. Krempel, Angela R. May | 2003-12-30 |
| 6579218 | Centrifugal filter utilizing a partial vacuum condition to effect reduced air drag on the centrifuge rotor | Louis A. Krempel, Steven J. Merritt | 2003-06-17 |
| 6517475 | Centrifugal filter for removing soot from engine oil | Gene W. Brown, Steven J. Merritt, Farrell F. Calcaterra, John H. Beard, Louis A. Krempel | 2003-02-11 |
| 6463157 | Bone conduction speaker and microphone | — | 2002-10-08 |
| 6213929 | Motor driven centrifugal filter | — | 2001-04-10 |
| 6210311 | Turbine driven centrifugal filter | — | 2001-04-03 |
| 5889730 | Underwater audio communication system using bone conducted sound | — | 1999-03-30 |
| 5706251 | Scuba diving voice and communication system using bone conducted sound | — | 1998-01-06 |
| 5579284 | Scuba diving voice and communication system using bone conducted sound | — | 1996-11-26 |