Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7534355 | Storm drain filter with variable flow capacity | Houston Linwood Crumpler, John Crumpler | 2009-05-19 |
| 7276156 | Storm drain filter | Houston Linwood Crumpler, John Crumpler | 2007-10-02 |