Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7703474 | Gate valve sealing structure | — | 2010-04-27 |
| D583067 | Manhole assembly gate valve sealing structure | — | 2008-12-16 |
| D577106 | Gate valve sealing structure | — | 2008-09-16 |
| D548309 | Gate valve sealing structure | — | 2007-08-07 |
| D546924 | Gate valve sealing structure | — | 2007-07-17 |
| 6449908 | Gate valve box sealing | — | 2002-09-17 |
| 6226929 | Liquid infiltration prevention structures for preventing liquid infiltration manhole assemblies gate value sealing structures for preventing settling or shifting of key box bonnets and method for using said structures | — | 2001-05-08 |
| 6044590 | Liquid infiltration prevention structures for preventing liquid infiltration manhole assemblies | — | 2000-04-04 |
| 4556081 | Butterfly valve adaptor | — | 1985-12-03 |
| 4534378 | Gate valve adaptor | Stanley Gagas | 1985-08-13 |
| 4449715 | External manhole seal | — | 1984-05-22 |
| 4440407 | Manhole cover gasket seal | — | 1984-04-03 |