With many historic inventions, there are regularly disagreements about the identification of the creator, the foundation of the idea, and the time when the product was once first used. In this list, we’ll seem at 10 extraordinary innovations from the 1900s. Although some of their backstories are nevertheless unclear, we do recognize the charming histories of others. More importantly, every one of these innovations has to turn out to be as common today, in one structure or another, as historical inventions, like paper and concrete, have.