- Apr 12 George C Blickensderfer patents portable typewriter
General Electric Company
Apr 15 General Electric Company formed by merger of Thomas Edison's General Electric Company with Thomson-Houston Electric Company, arranged by J. P. Morgan and incorporated in NY
- Apr 17 1st Sunday NL baseball game, Reds beat Cards 5-1
- Apr 19 Charles Duryea takes the 1st American-made automotive for a test drive
- Apr 21 Black longshoremen strike for higher wages in St Louis, Missouri
- Apr 28 1st performance of Antonín Dvořák's overture "Carnival Overture"
- Apr 29 Charlie Reilly is baseball's 1st pinch hitter
Admirals
Aviators
Gangsters
Generals
Industrialists
Suffragists