Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE36743 | Pre-mix flame type burner | — | 2000-06-20 |
| 5458484 | Pre-mix flame type burner | — | 1995-10-17 |
| 5247804 | Method and apparatus for recovering and purifying refrigerant including liquid recovery | Lowell E. Paige | 1993-09-28 |
| 5181390 | Manually operated refrigerant recovery apparatus | Wayne B. Cavanaugh, Lowell E. Paige | 1993-01-26 |
| 5174124 | Apparatus for sampling the purity of refrigerant flowing through a refrigeration circuit | Lowell E. Paige | 1992-12-29 |
| 5127232 | Method and apparatus for recovering and purifying refrigerant | Lowell E. Paige | 1992-07-07 |
| 5112217 | Method and apparatus for controlling fuel-to-air ratio of the combustible gas supply of a radiant burner | Daniel R. Clark | 1992-05-12 |
| 5076494 | Integrated hot water supply and space heating system | — | 1991-12-31 |
| 5038750 | Air heating apparatus | Norman A. Washburn | 1991-08-13 |
| 5010740 | Refrigeration system with mass flow limiting device | Robert J. Backus, Robert A. Chopko, Alan S. Drucker | 1991-04-30 |
| 4993402 | Fuel efficient rapid response water heating module | — | 1991-02-19 |
| 4945890 | Induced draft warm air furnace with radiant infrared burner | — | 1990-08-07 |
| 4904179 | Low NO.sub.x primary zone radiant screen device | Thomas E. Drago | 1990-02-27 |
| 4880157 | Capacity control for integrated furnace | Jay L. Boot, Ian M. Shapiro | 1989-11-14 |
| 4807588 | Water permeable heat exchanger for condensing furnace | Richard M. Bentley, Henry F. Keller | 1989-02-28 |
| 4782815 | Liquid-backed gas-fired heating system | James N. Friedman | 1988-11-08 |
| 4776320 | Device for inhibiting NO.sub.x formation by a combustion system | John A. Shaheen | 1988-10-11 |
| 4738394 | Integral liquid-backed gas-fired space heating and hot water system | Jay L. Boot, Ian M. Shapiro | 1988-04-19 |
| 4570612 | Induced draft submerged burner | James N. Friedman, Thomas E. Drago | 1986-02-18 |
| 4467780 | High efficiency clamshell heat exchanger | — | 1984-08-28 |
| 4231417 | Method and apparatus for reducing corrosion in a heat exchanger | — | 1980-11-04 |