Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11536003 | Manhole inserts and manhole insert gasket fabrication methods | Michael Forlong | 2022-12-27 |
| 10011971 | Manhole inserts and manhole insert gasket fabrication methods | Robert D. Forlong | 2018-07-03 |
| 9784650 | Sewer gas sampling and analyzing devices and methods | — | 2017-10-10 |
| 9022685 | Enhanced strength manhole cover assembly and fabrication method | Rober Forlong | 2015-05-05 |
| 7748927 | Manhole insert and tether locking apparatus and method | — | 2010-07-06 |
| 5966876 | Manhole insert and tether apparatus and method | Timothy Ely, Michael D. Humke, Michael W. Humke | 1999-10-19 |
| 5727351 | Manhole insert and tether and method | Timothy Ely | 1998-03-17 |
| 4957389 | Method and apparatus for sealing manholes | — | 1990-09-18 |
| 4919564 | Manhole insert | Harold E. Owen, II | 1990-04-24 |