Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 6565012 | Air freshener An air freshener dispenser having a transparent outer container. A detachably mounted top has one or more openings to allow circulation. A detachable insert is suspended in the outer container and thus floats in the outer container above the outer contain... | 05/20/2003 |
| 5390660 | Pre-wired and pre-plumbed module for use with an installed hydronic radiant floor heating system A pre-wired and pre-plumbed module for connection to an installed hydronic radiant floor heating system including a supporting frame having components mounted thereon such as a boiler, pumps, four-way valve, in-line air separator, expansion tank, P/T port... | 02/21/1995 |
| 5305735 | Direct fired hot water generator with more than one heat exchange zone A container having a chamber with a cool water inlet disposed at the top thereof in a burner near the bottom thereof. An exhaust for flue gases is disposed at the top of the container. A first heat exchange zone is disposed in the chamber above the burner... | 04/26/1994 |
| 5221043 | Outside waste oil furnace A furnace located outside of a building or other enclosure to be heated with the furnace utilizing waste oil as a combustible fuel. The furnace is associated with a storage tank for the oil which includes a preheater or warmer therein as well as an oil pr... | 06/22/1993 |
| 4782815 | Liquid-backed gas-fired heating system A liquid-backed gas-fired heating system is disclosed which utilizes an infrared burner module having a helical coil wrapped concentrically thereabout. The helical coil located in the radiant zone and convective zone of the module receives heat from the h... | 11/08/1988 |
| 4479484 | Pulsing combustion A pulsing combustion device is disclosed including a combustion chamber with a poppet valve mounted for reciprocation in the combustion chamber. A pressurized combustible mixture is supplied to the poppet valve with the combustion gases ignited in the com... | 10/30/1984 |
| 4076011 | Warm air heating and fire-place system A warm air heating system which efficiently and inexpensively combines a fire-place to another warm air heating device or unit to form a balanced warm air heating system and thus efficiently use the heat output of the fire-place. This warm air heating sys... | 02/28/1978 |
