- 
  
  Discovered by Benjamin Franklin
- 
  
  Created by Michael Faraday
- 
  
  Built by Peter Cooper
- 
  
  Created by Samuel Morse
- 
  
  Created by Joseph Henry
- 
  
  created by George B. Simpson
- 
  
  created by Thomas Edison
- 
  
  Discovered by Henry Becquerel
- 
  
  
- 
  
  created by Alessandro Volta