First commercially available bubblegum

In 1869, William Finley Semple (USA) became the first person to patent a chewing gum (US patent #98,304), and by 1906, Frank Henry Fleer (USA) had invented a form of bubblegum but it never reached the stores. It wasn't until 1928 that consumers could blow bubbles with their gum after Walter Diemer (USA), an employee of Fleer's, introduced two unique selling points: he dyed the gum pink, and invented a formula that allowed big bubbles to be blown safely. Prior to Diemer's "Dubble Bubble", burst chewing gum residue had to be removed from the face using turpentine! Unfortunately, he was never paid royalties for his invention.