Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6532985 | Further enhanced features for backflow prevention device enclosure | Herman W. Griffin | 2003-03-18 |
| 6311720 | Cover for protecting piping assemblies with engagement rod | Herman W. Griffin | 2001-11-06 |
| 6293301 | Backflow prevention device enclosure having improved access | Herman W. Griffin | 2001-09-25 |
| 6021804 | Cover for protecting piping assemblies | Herman W. Griffin | 2000-02-08 |
| 5996611 | Enhanced features for backflow prevention device cover | Herman W. Griffin | 1999-12-07 |
| 5743289 | Drain channel and forms for backflow prevention device cover | Herman W. Griffin | 1998-04-28 |
| 5740832 | Elevated cover for backflow prevention device | Herman W. Griffin | 1998-04-21 |