Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6820818 | High efficiency hydronic heat system | — | 2004-11-23 |
| 6733278 | Variable heat output burner assembly | — | 2004-05-11 |
| 6135063 | Dual regulator direct-fired steam generator | — | 2000-10-24 |
| 5775581 | Dual heat source heating system | — | 1998-07-07 |
| 5368474 | Direct fired hot water generator with more than one heat exchange zone | — | 1994-11-29 |
| 5305735 | Direct fired hot water generator with more than one heat exchange zone | — | 1994-04-26 |
| 4614491 | Multiple burner control apparatus | — | 1986-09-30 |
| 4462342 | Variable stage direct field boiler | — | 1984-07-31 |
| 4354481 | Heating apparatus | — | 1982-10-19 |