2 Answers

Believe it or not, they are still being used for air fresheners, hair spray, bug spray and other things, vanity is insane!

http://www.bing.com/search?q=aerosol+spray+manufacturers&pc=Z134&form=ZGAFDF&install_date=20111112

From Wikipedia-

The concepts of aerosol probably goes as far back as 1790.[1] The first aerosol spray can was invented in Oslo on November 23, 1926 by Erik Rotheim, a Norwegian chemical engineer.[1] The patent was sold to a US company for 100,000 Norwegian kroner.[2] The Norwegian Post Office celebrated the invention by issuing a stamp in 1998.

In 1939, American Julian S. Kahn received a patent for a disposable spray can,[3] but the product remained largely undeveloped. It was not until 1941 that the aerosol spray can was first put to good use by Americans Lyle Goodhue and William Sullivan, who are credited as the inventors of the modern spray can.