Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9574337 | Flow control methods and devices | Timothy Joel Lang, Douglas Kim Graham | 2017-02-21 |
| 9309989 | Flow control device | Timothy Joel Lang, Douglas Kim Graham | 2016-04-12 |
| 9290923 | Flow control device for a storm water management system | Timothy Joel Lang, Douglas Kim Graham | 2016-03-22 |
| 7459090 | Stormwater treatment system and method | — | 2008-12-02 |
| 6783683 | Stormwater pollutant separation system and method of stormwater management | — | 2004-08-31 |