Today in History, April 8, 1862:
John D. Lynde of Philadelphia receives a patent for an “improved” aerosol spray bottle. The concept was not new, but Lynde perfected the use of gasses to propel spray mists from a bottle.
Today we use aerosol devices for personal care products, kitchen sprays and many other applications in farming and industry. Perhaps most importantly for medical purposes such as inhalers and atomisers.