Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |