Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8678449 | Pipe joint and related method | William L. Zepp, James Shade | 2014-03-25 |
| 8491224 | Plastic detention chamber for stormwater runoff and related system and methods | Daniel P. Cobb, Michael P. Stone, Michael G. Katona, Roger L. Brockenbrough | 2013-07-23 |
| 8109540 | Pipe joint and related method | William L. Zepp, James Shade | 2012-02-07 |
| 7574886 | Apparatus for producing helically corrugated metal pipe and related method | William L. Zepp | 2009-08-18 |
| 7404308 | Apparatus for producing helically corrugated metal pipe and related method | William L. Zepp | 2008-07-29 |
| 7186058 | Stormwater detention system and method | Vaikko P. Allen, II, Daniel P. Cobb, Thomas R. Adams | 2007-03-06 |
| 6524722 | Corrugated structural metal plate | — | 2003-02-25 |
| 5564857 | Slutted drain | — | 1996-10-15 |
| 5380121 | Slotted drain | — | 1995-01-10 |