Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6971820 | Microblower assisted barometric valve | Warren K. Hyde, Brian D. Riha, Dennis G. Jackson, Frank Sappington | 2005-12-06 |
| 6591700 | Apparatus for passive removal of subsurface contaminants and mass flow measurement | Dennis G. Jackson, Brian D. Riha | 2003-07-15 |
| 6425298 | Apparatus for passive removal of subsurface contaminants and volume flow measurement | Dennis G. Jackson, Brian D. Riha | 2002-07-30 |
| 6367563 | Method and device for removing a non-aqueous phase liquid from a groundwater system | Brian B. Looney, Brian D. Riha | 2002-04-09 |
| 5922950 | Depth-discrete sampling port | Bradley E. Pemberton, Christopher P. May, Brian D. Riha, Ralph L. Nichols | 1999-07-13 |
| 5889217 | Process and apparatus for obtaining samples of liquid and gas from soil | Christopher P. May, Bradley E. Pemberton, Jim Shinn, Keith R. Sprague | 1999-03-30 |
| 5775424 | Depth-discrete sampling port | Bradley E. Pemberton, Christopher P. May, Brian D. Riha, Ralph L. Nichols | 1998-07-07 |
| 5641245 | Apparatus for passive removal of subsurface contaminants | Bradley E. Pemberton, Christopher P. May | 1997-06-24 |