Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11007334 | Ventilation system | Earl Refsland | 2021-05-18 |
| 9526853 | Ventilation system | Earl Refsland | 2016-12-27 |
| 9022746 | Shuttling by-pass compressor apparatus | Stephen Palmer | 2015-05-05 |
| 8656913 | Ventilator apparatus | — | 2014-02-25 |
| 7530365 | Surge prevention device | William Kullmann | 2009-05-12 |
| 7174909 | Surge prevention device | William Kullmann | 2007-02-13 |
| 7128080 | Surge prevention device | William Kullmann | 2006-10-31 |
| 6954952 | Backboard | — | 2005-10-18 |
| 6910504 | Surge prevention device | William Kullmann | 2005-06-28 |
| 6901962 | Surge prevention device | William Kullmann, Ian F. Murphy | 2005-06-07 |
| 6622743 | Surge prevention device | Gabriel Kohn, David L. Boger | 2003-09-23 |
| 6318407 | Pressure regulator with gauge | Gabriel Kohn, Charles Michaely, David L. Boger | 2001-11-20 |
| 6085597 | Gauge protector | Jeffery Alan Miller, Gabriel Kohn, Kin Edward Golemb, Peter Gonzalez | 2000-07-11 |