Issued Patents 2018
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10053850 | Manhole base assembly with internal liner and method of manufacturing same | Jimmy D. Gamble, Robert R. Slocum, John M. Kaczmarczyk | 2018-08-21 |
| D814285 | Expandable sealing mechanism | Graham E. Blackwood, Katherine A. Bergfeld, Michael R. Miller, John M. Kaczmarczyk | 2018-04-03 |
| D813661 | Expandable sealing mechanism | Graham E. Blackwood, Katherine A. Bergfeld, Michael R. Miller, John M. Kaczmarczyk | 2018-03-27 |