Carburetor
The first carburetor was invented by Samuel Morey in 1826. The first person to patent a carburetor for use in a petroleum engine was Siegfried Marcus with his 6 July 1872 patent for a device which mixes fuel with air.
Rebreather
The first basic rebreather based on carbon dioxide absorption was patented in France in 1808 by "Sieur" from Brest, a mechanic in Napoleon's Imperial Navy. This early rebreather design worked with an oxygen reservoir, the oxygen being delivered progressively by the diver and circulating in a closed circuit through a sponge soaked in limewater. Touboulic called his invention "Ichtioandre" (Greek for 'fish-man'). There is no evidence of a prototype having been manufactured.