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                        Flapper check valve
                                - 
                                    Patent number 4,951,706
                                
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                                    Issue date Aug 28, 1990
                                
 
                                - 
                                         Fulton Thermatec Corporation Fulton Thermatec Corporation
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                                         Peter  Kardos Peter  Kardos
 
                                - 
                                         F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT... F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
 
 
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                        Process for pulse combustion
                                - 
                                    Patent number 4,926,798
                                
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                                    Issue date May 22, 1990
                                
 
                                - 
                                         Gas Research Institute Gas Research Institute
- 
                                         Peter  Kardos Peter  Kardos
 
                                - 
                                         F24 - HEATING RANGES VENTILATING F24 - HEATING RANGES VENTILATING
 
 
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                        Pulse combustor
                                - 
                                    Patent number 4,884,963
                                
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                                    Issue date Dec 5, 1989
                                
 
                                - 
                                         Gas Research Institute Gas Research Institute
- 
                                         Peter  Kardos Peter  Kardos
 
                                - 
                                         F24 - HEATING RANGES VENTILATING F24 - HEATING RANGES VENTILATING
 
 
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                        Flapper control valve
                                - 
                                    Patent number 4,856,558
                                
- 
                                    Issue date Aug 15, 1989
                                
 
                                - 
                                         Gas Research Institute Gas Research Institute
- 
                                         Peter  Kardos Peter  Kardos
 
                                - 
                                         F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS