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Class Information
Number: 126/99A
Name: Stoves and furnaces > Hot-air furnaces > Tubular heater
Description:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7422429 |
Heat exchange furnace and its manufacturing process |
Sep. 9, 2008 |
| 7393206 |
Heat exchange furnace with serpentine gas flow path disposed within heat exchange space |
Jul. 1, 2008 |
| 6758208 |
Flexible gas-fired heat exchanger system |
Jul. 6, 2004 |
| RE37128 |
Standing pilot furnace with vented vestibule |
Apr. 10, 2001 |
| 6044837 |
Intertwined helical heat exchanger |
Apr. 4, 2000 |
| 6026801 |
Plug core heat exchanger |
Feb. 22, 2000 |
| 5649529 |
Low NO.sub.x combustion system for fuel-fired heating appliances |
Jul. 22, 1997 |
| 5505252 |
Heat exchanger |
Apr. 9, 1996 |
| 5408986 |
Acoustics energy dissipator for furnace |
Apr. 25, 1995 |
| 5301654 |
Heat-exchanger especially for forced air furnaces |
Apr. 12, 1994 |
| 5293860 |
Standing pilot furnace with vented vestibule |
Mar. 15, 1994 |
| 5279278 |
Burner unit |
Jan. 18, 1994 |
| 5244381 |
NO.sub.x flame spreader for an inshot burner |
Sep. 14, 1993 |
| 5222476 |
Low NOx aspirated burner apparatus |
Jun. 29, 1993 |
| 5199416 |
Hot air heat exchanger |
Apr. 6, 1993 |
| 5105797 |
Solid fuel burning stove |
Apr. 21, 1992 |
| 5062790 |
Burner sound reduction enclosure |
Nov. 5, 1991 |
| 5038750 |
Air heating apparatus |
Aug. 13, 1991 |
| 5022379 |
Coaxial dual primary heat exchanger |
Jun. 11, 1991 |
| 4991396 |
High performance burner |
Feb. 12, 1991 |
| 4974579 |
Induced draft, fuel-fired furnace apparatus having an improved, high efficiency heat exchanger |
Dec. 4, 1990 |
| 4960102 |
Fuel-fired condensing type forced air heating furnace |
Oct. 2, 1990 |
| 4938283 |
Bell orifice plate for inshot combustion furnace |
Jul. 3, 1990 |
| 4905661 |
Heat exchanger |
Mar. 6, 1990 |
| 4777928 |
Efficient, pollution free, woodburning furnace |
Oct. 18, 1988 |
| 4776320 |
Device for inhibiting NO.sub.x formation by a combustion system |
Oct. 11, 1988 |
| 4603680 |
Furnace inducer outlet box assembly |
Aug. 5, 1986 |
| 4579102 |
Biomass heat exchanger furnace |
Apr. 1, 1986 |
| 4577615 |
Heat pipe central furnace |
Mar. 25, 1986 |
| 4558689 |
Combustion gas heat recovery apparatus |
Dec. 17, 1985 |
| 4557249 |
Compact high efficiency furnace |
Dec. 10, 1985 |
| 4557248 |
Wood and gas fired furnace |
Dec. 10, 1985 |
| 4518117 |
Furnace structure |
May. 21, 1985 |
| 4515145 |
Gas-fired condensing mode furnace |
May. 7, 1985 |
| 4478206 |
Furnace having water vapor-condensing secondary heat exchanger |
Oct. 23, 1984 |
| 4478158 |
Condensing furnaces |
Oct. 23, 1984 |
| 4476850 |
Noise reducing heat exchanger assembly for a combustion system |
Oct. 16, 1984 |
| 4449510 |
Biomass heat exchanger furnace |
May. 22, 1984 |
| 4409955 |
Solid fuel warm air furnace |
Oct. 18, 1983 |
| 4396002 |
Tubular air heater |
Aug. 2, 1983 |
| 4312321 |
Heat exchanger construction for solid fuel burning furnace |
Jan. 26, 1982 |
| 4309977 |
Pulse combustion apparatus |
Jan. 12, 1982 |
| 4275705 |
Two-stage heat exchanger |
Jun. 30, 1981 |
| 4256082 |
Warm air furnace |
Mar. 17, 1981 |
| 4232651 |
Wood burning furnace |
Nov. 11, 1980 |
| 4201187 |
Modular solid fuel furnace system |
May. 6, 1980 |
| 4194488 |
Home heating system |
Mar. 25, 1980 |
| 4190035 |
Fluid heater |
Feb. 26, 1980 |
| 4170982 |
Solar energy storage and distributing device |
Oct. 16, 1979 |
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