Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 7766028 | Pressure regulator | Roger Massengale, Charles J. McPhee | 2010-08-03 | |
| 7546846 | Pressure regulator | Roger Massengale, Charles J. McPhee | 2009-06-16 | $1,697,000 |
| 7264018 | Pressure regulator | Roger Massengale, Charles J. McPhee | 2007-09-04 | |
| 7114520 | Pressure regulator | Roger Massengale, Charles J. McPhee | 2006-10-03 | $3,505,000 |
| 6938642 | Pressure regulator | Roger Massengale, Charles J. McPhee | 2005-09-06 | $3,802,000 |
| 6619308 | Pressure regulator | Roger Massengale, Charles J. McPhee | 2003-09-16 | $3,867,000 |
| 5433194 | Drain valve for pressurized gas system | — | 1995-07-18 | |
| 4824165 | Apparatus for selectively varying air resistance on a land transport vehicle to optimize reduction of drag | — | 1989-04-25 | |
| 4459982 | Servo-controlled demand regulator for respiratory ventilator | — | 1984-07-17 | |
| 4401116 | Gas flow rate control device for medical ventilator | Claude C. Hurd | 1983-08-30 |