| 10112128 |
Apparatus for securing underdrain filter block |
Dean T. Berkebile, Christopher J. Ball |
2018-10-30 |
| 10052572 |
Underdrain filter block |
Dean T. Berkebile, Christopher J. Ball |
2018-08-21 |
| 9199186 |
Underdrain flume plate |
John L. Geibel, Christopher J. Ball |
2015-12-01 |
| 9072990 |
Apparatus for securing underdrain filter block |
Dean T. Berkebile, Christopher J. Ball |
2015-07-07 |
| 9017554 |
Handle for underdrain |
— |
2015-04-28 |
| 8889003 |
Underdrain filter block including a grout chamber |
Dean T. Berkebile, Christopher J. Ball |
2014-11-18 |
| 7530255 |
Devices, systems and methods for testing of gas detectors |
William R. Frank, Jon K. Haverstick |
2009-05-12 |
| 7180076 |
Photoionization detectors, ionization chambers for use in photoionization detectors, and methods of use of photoionization detectors |
Jon K. Haverstick, Michael B. Schulman, Mark F. Zanella, Sr., James A. Cahall, James Brooks Miller |
2007-02-20 |
| 5495747 |
Device for detecting gases for use in diffusion and forced flow modes |
Roberta Herman, Alan A. Schneider, Stephen E. Long |
1996-03-05 |
| 5370004 |
Multiple port personal air sampling apparatus |
Clayton J. Bossart, Charles H. Etheridge |
1994-12-06 |
| 4538458 |
Temperature compensated gas meters |
John L. Esola |
1985-09-03 |