https://www.invent.org/inductees/william-d-coolidge
NIHF Inductee William Coolidge and the X-Ray Tube
National Inventors Hall of Fame Inductee William Coolidge's name is inseparably linked with the X-ray tube, which is popularly called the "Coolidge tube."
william coolidgeand thex raynihfinductee
https://commons.wikimedia.org/wiki/Category:William_David_Coolidge
Category:William David Coolidge - Wikimedia Commons
william david coolidgecategorywikimediacommons