| 10144043 |
Devices and methods for landfill gas well monitoring and control |
David Fischer |
2018-12-04 |
| 10053955 |
System and method for distributed control of multiple wellheads |
David Fischer |
2018-08-21 |
| 10029291 |
Devices and methods for landfill gas well monitoring and control |
David Fischer |
2018-07-24 |
| 9062536 |
Devices and methods for landfill gas well monitoring and control |
David Fischer |
2015-06-23 |
| 6508310 |
Bladder-type sampling pump controller |
David Fischer, David B. Kaminski |
2003-01-21 |
| 6456201 |
Method and apparatus for measuring groundwater levels |
David Fischer, David B. Kaminski |
2002-09-24 |
| 6415659 |
Method for analyzing purge water |
David Fischer, David B. Kaminski |
2002-07-09 |
| RE34754 |
Fluid sampling apparatus |
William D. Dickinson, Frederick E. Bernardin, Jr. |
1994-10-11 |
| 5261348 |
Flow-through cell with diverter circuit |
K. Lynn Niehaus |
1993-11-16 |
| 5146998 |
Apparatus and method for underground sampling |
Kent E. Cordry, K. Lynne Niehaus |
1992-09-15 |
| 4727936 |
Recovery and control system for leachate collection |
David Fischer, David H. Edwards |
1988-03-01 |
| 4585060 |
Fluid sampling apparatus |
Frederick E. Bernardin, Jr., William D. Dickinson |
1986-04-29 |
| 4489779 |
Fluid sampling apparatus |
William D. Dickinson, Frederick E. Bernardin, Jr. |
1984-12-25 |