Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 5542022 | Compact packed bed heater system A compact portable apparatus and method for heating gases for periods ranging from about one tenths of a second to several minutes to temperatures as high as 2700° Celsius in 4 hrs. Graphite or metal oxide spherical pebbles which are placed in an externa... | 07/30/1996 |
| 4624191 | Air cooled cyclone coal combustor for optimum operation and capture of pollutants during combustion An air-cooled cyclone coal combustor comprises a horizontally disposed shell, provided with a non-sacrificial refractory liner. The liner is surrounded by an array of air-cooling tubes, the tubes serving both to cool the liner and to physically support an... | 11/25/1986 |
