Walter Kidde (/ˈkɪdə/; March 7, 1877 – February 9, 1943) was an American businessman. He graduated from Stevens Institute of Technology in 1897. He was the owner of the Kidde company which manufactured fire extinguishers.His parents immigrated to the United States from Bohemia. Kidde died of a heart attack in 1943 at the age of 65. (He is unrelated to the Danish Kidde family, to which author Harald Kidde and cartoonist and author Rune T. Kidde belong.)