Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7789317 | System and method for heat pump oriented zone control | Mark Votaw, Joseph Ramunni, Dennis Laughlin, Al Zelczer, Leonard Roth +1 more | 2010-09-07 |
| 7775448 | System and method for heat pump oriented zone control | Mark Votaw, Joseph Ramunni, Dennis Laughlin, Al Zelczer, Leonard Roth +1 more | 2010-08-17 |
| 7566264 | Small duct high velocity damper assembly | Mark Votaw, Joseph Ramunni, Dennis Laughlin, Al Zelczer, Leonard Roth +2 more | 2009-07-28 |
| 5774906 | Wave pool curbing system | Herbert S. Ellis, James Dunn, Kenneth L. Ellis | 1998-07-07 |
| 5279002 | Inlaid tile gutter system | Herbert S. Ellis | 1994-01-18 |