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| Number | Title | Issue Date |
| 6647903 | Method and apparatus for generating and utilizing combustible gas Apparatus and method for generating fuel gas and optionally, activated carbon gasification from biomass fuel.... | 11/18/2003 |
| 6332411 | Furnace The furnace is intended for burning solid fuel (mainly fire-wood) in continuous mode of operation, with significant amount of heat released in the form of hot combustion products usable in wood-drying installations, for house heating, destroying of refuse... | 12/25/2001 |
| 5799596 | Ashing furnace and method A furnace comprises an enclosure, a hearth plate within the enclosure for supporting combustible material, a first heater element adjacent the hearth plate for initial combustion of the combustible material, a filter disposed above the hearth plate for fi... | 09/01/1998 |
| 4643744 | Apparatus for ionizing air Apparatus for ionizing air, for example for feeding to a boiler to act as a catalyst, comprises a closed container (15) which is divided into two chambers (17, 18). Water is fed under pressure to atomizing jets (21,22) which produce a mist inside each cha... | 02/17/1987 |
