Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 7252503 | Wind-proof venturi tube A venturi tube has a configuration of baffles affixed thereto that serve to greatly reduce the susceptibility of a gas burning appliance to wind gusts. The baffles cooperate to force incoming primary combustion air through a circuitous route before introduction into... | 08/07/2007 |
| 5347957 | Water heater with reduced NOx output A water heater with reduced nitrogen oxides output utilizing NOx reducing water conduits to cool a laminar flame and thereby reduce production of nitrogen oxides, The water heater has a partially aerated burner using a partially premixed combus... | 09/20/1994 |
| 4751897 | Heating bodies for gas water heaters A heating body is provided for a gas water heater in the form of a vertical tubular chamber (1) obstructed at its upper end by a heat exchanger (2) itself having a pipe section (4) through which the water to be heated flows, the rear (6) and side (7,8) po... | 06/21/1988 |
| 4421066 | High efficiency boiler A boiler is disclosed having a horizontal heat exchanger in the form of hollow tubes positioned across the top of a combustion chamber. Vertical heat exchangers are also provided at either ends of the tubes. The vertical heat exchangers are in the form of... | 12/20/1983 |
| 4310746 | Electric fluid heating apparatus A fluid heating apparatus includes a thermally insulated housing divided by a thermally insulated vertical partition into a flue passage and a heat exchange chamber, the partition having top and bottom openings providing communication between the passage ... | 01/12/1982 |
| 4016834 | Boiler with condenser An arrangement for heating a liquid including a boiler, and a condenser located at least in part within the boiler and open at its inlet end which is located within the boiler such that the liquid/gas combination heated in the boiler passes directly into ... | 04/12/1977 |
| 3934554 | Water and room heater A water and room heating unit for extracting heat from combustible material. The heating unit includes a firebox chamber formed from a plurality of water chambers that are arranged in a U-shape and are interconnected by a first network of pipes which also... | 01/27/1976 |
