title: Alexander M. Nicholson
text: # Alexander M. Nicholson
  
  Alexander M. Nicholson was an American scientist, most notable for inventing the first crystal oscillator, using a piece of Rochelle salt in 1917 while working at Bell Telephone Laboratories. He then filed a patent the next year. His priority was later disputed by Walter Guyton Cady who invented the first quartz crystal oscillator in 1921.
  
  