Invention of the Radio (2) tv-pg Play video Select your TV provider to log in to have full access to videos Select your TV provider See all providers Don't see your TV provider? Learn more You can access this video on the free HISTORY® apps. *You must verify your TV provider towatch this video on the App Your Parental Control settings do not allow you to view this content. Invention of the Radio (2 min) tv-pg The first radio signals beamed across America In the early 20th century. See how this cultural revolution began.