Issued Patents All Time
Showing 25 most recent of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10040046 | Systems and methods of treating water used for hydraulic fracturing | — | 2018-08-07 |
| 9688394 | Roller-based drive systems with compliance for accommodating non-conjugate meshing | Donald J. Christensen | 2017-06-27 |
| 9550564 | Aircraft wheel driving system | Donald J. Christensen | 2017-01-24 |
| 9499260 | Aircraft landing gear wheel with integral gear drive | Donald J. Christensen | 2016-11-22 |
| 9358517 | Systems and methods of treating water used for hydraulic fracturing | — | 2016-06-07 |
| 9157494 | Centrifugal engagement and disengagement drive systems | Allan Steves, James Knorr | 2015-10-13 |
| 8962534 | Systems and methods of treating water used for hydraulic fracturing | — | 2015-02-24 |
| 8448678 | Water collection apparatus and method | — | 2013-05-28 |
| 8347927 | Water collection apparatus and method | — | 2013-01-08 |
| 6983736 | Governor stabilizer | Richard A. Dykstra | 2006-01-10 |
| 6971369 | Pressure assisted governor | Richard W. Seilenbinder | 2005-12-06 |
| 6647942 | Engine starting and stopping device | Art Poehlman, Gary J. Gracyalny | 2003-11-18 |
| 6595176 | Engine starting and stopping device | Art Poehlman, Gary J. Gracyalny | 2003-07-22 |
| 6584964 | Engine having a centrifugal oil separator | Richard W. Seilenbinder | 2003-07-01 |
| 6386169 | Starting and stopping device for internal combustion engine | Gary J. Gracyalny, Art Poehlman, Richard A. Dykstra, Steven Dethloff, Charles Brown +6 more | 2002-05-14 |
| D456051 | Exercise device | — | 2002-04-23 |
| D451971 | Exercise device | — | 2001-12-11 |
| 6311663 | Starting and stopping device for internal combustion engine | Gary J. Gracyalny, Art Poehlman, Richard A. Dykstra, Steven Dethloff, Charles Brown +6 more | 2001-11-06 |
| 6263852 | Starting and stopping device for internal combustion engine | Gary J. Gracyalny, Art Poehlman, Richard A. Dykstra, Steven Dethloff, Charles Brown +6 more | 2001-07-24 |
| 6260529 | Starting and stopping device for internal combustion engine | Gary J. Gracyalny, Art Poehlman, Richard A. Dykstra, Steven Dethloff, Charles Brown +6 more | 2001-07-17 |
| 6237555 | Spark blanking apparatus for an internal combustion engine | Richard A. Dykstra, Gary J. Gracyalny | 2001-05-29 |
| 6239709 | Liquid level sensor for internal combustion engine | Richard A. Dykstra | 2001-05-29 |
| 6230678 | Starting and stopping device for internal combustion engine | Gary J. Gracyalny, Art Poehlman, Richard A. Dykstra, Steven Dethloff, Charles Brown +6 more | 2001-05-15 |
| 6145487 | Automatic air inlet control system for an engine | Richard A. Dykstra | 2000-11-14 |
| 6029619 | Remote primer | — | 2000-02-29 |