Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10773878 | Free flow collar for control valves | — | 2020-09-15 |
| 10627036 | Pressure and headloss maintaining valve system for clean and dirty water systems | — | 2020-04-21 |
| 7766031 | Condensate collection system and drain | Henry J. Zawada | 2010-08-03 |
| 6196039 | Groove rolling of piping elements | James O. Williams, Sandra M. Lippka | 2001-03-06 |
| 5786054 | Inductive welding of thermoplastic pipe | Dennis E. McAtamney | 1998-07-28 |
| 5524674 | Inductive welding of thermoplastic pipe | Dennis E. McAtamney | 1996-06-11 |
| 5509441 | Reaction injection molded valve | — | 1996-04-23 |
| 5503544 | Mold for reaction injection molding of a valve | — | 1996-04-02 |
| 5503192 | Inductive welding of thermoplastic pipe | Dennis E. McAtamney | 1996-04-02 |
| 5409654 | Method of reaction injection molding a valve | — | 1995-04-25 |
| 5236006 | Insulated HVAC valve assembly | Don A. Leonhard | 1993-08-17 |
| 4777977 | Composite butterfly valve housing | — | 1988-10-18 |
| 4774750 | Method of manufacture of a composite butterfly valve housing | — | 1988-10-04 |