Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6170507 | Gas valve with natural/LP gas conversion capability | James M. Dalton, Marvin D. Nelson | 2001-01-09 |
| 5944257 | Bulb-operated modulating gas valve with minimum bypass | Johan Pragt | 1999-08-31 |
| 5718256 | Burner controller assembly | James G. Buezis | 1998-02-17 |
| 5413141 | Two-stage gas valve with natural/LP gas conversion capability | — | 1995-05-09 |
| 5345963 | Modulating pressure regulator with shape memory alloy actuator | — | 1994-09-13 |
| 5215115 | Gas valve capable of modulating or on/off operation | — | 1993-06-01 |
| 5203688 | Safe gas control valve for use with standing pilot | — | 1993-04-20 |
| 5193993 | Safe gas valve | — | 1993-03-16 |
| 4790352 | Slow opening and fast closure gas valve | Frederick W. Johnson | 1988-12-13 |
| 4637429 | Fluid pressure regulating valve having adjustable two-stage and natural-LP gas changeover capabilities | Marvin D. Nelson | 1987-01-20 |
| 4621658 | Non-removable spring holder for a pressure operated valve | John D. Buezis | 1986-11-11 |
| 4547144 | Fuel gas control | Elwyn H. Olson, Ralph H. Torborg | 1985-10-15 |
| 4543974 | Gas valve with combined manual and automatic operation | Yong Chae Kim, Marvin D. Nelson, Elwyn H. Olson | 1985-10-01 |
| 4188013 | Gas valve seating member | Robert J. Battersby | 1980-02-12 |