22 August 1647 Denis Papin Inventor of pressure cooker (1679). He also developed the concept of steam lifting a piston and thus laid foundation for steam engine.
http://inventors.about.com/library/inventors/blsteamengine.htm - steam engine - more about the early engines.
1939 Patent for dispensing liquids under pressure from a disposable container was issued to Julius Seth Kahn. The patent was titled apparatus for mixing liquid with gas. It was the predecessor for aerosol can.
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