Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11906181 | System and method for wireless environmental zone control with positioning feedback | Al Zelczer, Leonard Roth, Richard Wilson | 2024-02-20 |
| 11408623 | System and method for wireless environmental zone control with positioning feedback | Al Zelczer, Leonard Roth, Richard Wilson | 2022-08-09 |
| 10948215 | System and method for wireless environmental zone control | Al Zelczer, Leonard Roth, Richard Wilson, Adam Bush | 2021-03-16 |
| 10731314 | System for sealing a manhole riser ring assembly | — | 2020-08-04 |
| 10190794 | System and apparatus for wireless environmental zone control | Al Zelczer, Leonard Roth, Richard Wilson, Adam Bush | 2019-01-29 |
| 8354139 | System for impregnating a liner for use in underground conduit repair | — | 2013-01-15 |
| 5049003 | Method and apparatus for repairing ruptures in underground conduits | — | 1991-09-17 |
| 5027895 | Expandable packer apparatus | — | 1991-07-02 |
| 4995761 | Method and apparatus for repairing ruptures in underground conduits | — | 1991-02-26 |